test

.dockerignore

@@ -1,6 +1,8 @@
+.editorconfig
 .git
-.gitignore
 .github
-.gitattributes
-READMETEMPLATE.md
-README.md
+.idea
+.vscode
+temp
+tmp
+LICENSE

.editorconfig

@@ -1,20 +1,12 @@
-# This file is globally distributed to all container image projects from
-# https://github.com/linuxserver/docker-jenkins-builder/blob/master/.editorconfig
-
-# top-most EditorConfig file
 root = true
 
-# Unix-style newlines with a newline ending every file
 [*]
+charset = utf-8
 end_of_line = lf
 insert_final_newline = true
-# trim_trailing_whitespace may cause unintended issues and should not be globally set true
-trim_trailing_whitespace = false
-
-[{Dockerfile*,**.yml}]
 indent_style = space
 indent_size = 2
+trim_trailing_whitespace = true
 
-[{**.sh,root/etc/s6-overlay/s6-rc.d/**,root/etc/cont-init.d/**,root/etc/services.d/**}]
-indent_style = space
+[Dockerfile]
 indent_size = 4

.github/CODEOWNERS

@@ -0,0 +1,3 @@
+# @link <https://help.github.com/en/articles/about-code-owners>
+
+* @tarampampam

.github/dependabot.yml

@@ -0,0 +1,16 @@
+# Docs: <https://docs.github.com/en/free-pro-team@latest/github/administering-a-repository/customizing-dependency-updates>
+
+version: 2
+
+updates:
+  - package-ecosystem: github-actions
+    directory: /
+    schedule: {interval: monthly}
+    reviewers: [tarampampam]
+    assignees: [tarampampam]
+
+  - package-ecosystem: docker
+    directory: /
+    schedule: {interval: monthly}
+    reviewers: [tarampampam]
+    assignees: [tarampampam]

.github/renovate.json

@@ -0,0 +1,7 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "github>tarampampam/.github//renovate/default",
+    ":rebaseStalePrs"
+  ]
+}

.github/workflows/documentation.yml

@@ -0,0 +1,19 @@
+name: documentation
+
+on:
+  push:
+    branches: [master, main]
+    paths: ['README.md']
+
+jobs:
+  docker-hub-description:
+    name: Docker Hub Description
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: peter-evans/dockerhub-description@v3 # Action page: <https://github.com/peter-evans/dockerhub-description>
+        with:
+          username: ${{ secrets.DOCKER_LOGIN }}
+          password: ${{ secrets.DOCKER_USER_PASSWORD }}
+          repository: tarampampam/3proxy

.github/workflows/release.yml

@@ -0,0 +1,40 @@
+name: release
+
+on:
+  release: # Docs: <https://git.io/JeBz1#release-event-release>
+    types: [published]
+
+jobs:
+  docker-image:
+    name: Build docker image
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v3
+
+      - {uses: gacts/github-slug@v1, id: slug}
+
+      - uses: docker/setup-qemu-action@v2
+
+      - uses: docker/setup-buildx-action@v2
+
+      - uses: docker/login-action@v2 # Action page: <https://github.com/docker/login-action>
+        with:
+          username: ${{ secrets.DOCKER_LOGIN }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      - uses: docker/login-action@v2 # Action page: <https://github.com/docker/login-action>
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - uses: docker/build-push-action@v4 # Action page: <https://github.com/docker/build-push-action>
+        with:
+          context: .
+          push: true
+          platforms: linux/amd64,linux/arm64
+          tags: |
+            tarampampam/3proxy:${{ steps.slug.outputs.version-semantic }}
+            tarampampam/3proxy:latest
+            ghcr.io/${{ github.actor }}/3proxy:${{ steps.slug.outputs.version-semantic }}
+            ghcr.io/${{ github.actor }}/3proxy:latest

.github/workflows/tests.yml

@@ -0,0 +1,121 @@
+name: tests
+
+on:
+  push:
+    branches: [master, main]
+    tags-ignore: ['**']
+  pull_request: {}
+
+concurrency:
+  group: ${{ github.ref }}
+  cancel-in-progress: true
+
+jobs: # Docs: <https://git.io/JvxXE>
+  gitleaks:
+    name: Gitleaks
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v3
+        with: {fetch-depth: 0}
+
+      - uses: gacts/gitleaks@v1
+
+  build-image:
+    name: Build docker image
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Build docker image
+        run: docker build -f ./Dockerfile --tag 3proxy:local .
+
+      - name: Save docker image
+        run: docker save 3proxy:local > ./docker-image.tar
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: docker-image
+          path: ./docker-image.tar
+          retention-days: 1
+
+  try-to-use:
+    name: Build and use docker image (auth ${{ matrix.auth }})
+    runs-on: ubuntu-20.04
+    strategy:
+      fail-fast: false
+      matrix:
+        auth: [yes, no]
+    needs: [build-image]
+    steps:
+      - name: Download built docker image
+        uses: actions/download-artifact@v3
+        with:
+          name: docker-image
+          path: .artifact
+
+      - name: Prepare image to run
+        working-directory: .artifact
+        run: docker load < docker-image.tar
+
+      - name: Start server without auth setup
+        if: matrix.auth != 'yes'
+        run: docker run --rm -d -p "3128:3128/tcp" -p "1080:1080/tcp" 3proxy:local
+
+      - name: Start server with auth setup
+        if: matrix.auth == 'yes'
+        run: docker run --rm -d -p "3128:3128/tcp" -p "1080:1080/tcp" -e "PROXY_LOGIN=evil" -e "PROXY_PASSWORD=live" -e 'EXTRA_ACCOUNTS={"foo":"bar"}' 3proxy:local
+
+      - name: Pause
+        run: sleep 3
+
+      - name: Try to use HTTP proxy
+        if: matrix.auth != 'yes'
+        run: |
+          curl -v --fail \
+            --proxy http://127.0.0.1:3128 \
+            --connect-timeout 3 \
+            --max-time 3 \
+            https://www.cloudflare.com/robots.txt
+
+      - name: Try to use SOCKS proxy
+        if: matrix.auth != 'yes'
+        run: |
+          curl -v --fail \
+            --proxy socks5://127.0.0.1:1080 \
+            --connect-timeout 3 \
+            --max-time 3 \
+            https://www.cloudflare.com/robots.txt
+
+      - name: Try to use HTTP proxy (with auth)
+        if: matrix.auth == 'yes'
+        run: |
+          curl -v --fail \
+            --proxy http://127.0.0.1:3128 \
+            --proxy-user evil:live \
+            --connect-timeout 3 \
+            --max-time 3 \
+            https://www.cloudflare.com/robots.txt
+
+      - name: Try to use HTTP proxy (with auth, extra user)
+        if: matrix.auth == 'yes'
+        run: |
+          curl -v --fail \
+            --proxy http://127.0.0.1:3128 \
+            --proxy-user foo:bar \
+            --connect-timeout 3 \
+            --max-time 3 \
+            https://www.cloudflare.com/robots.txt
+
+      - name: Try to use SOCKS proxy (with auth)
+        if: matrix.auth == 'yes'
+        run: |
+          curl -v --fail \
+            --proxy socks5://127.0.0.1:1080 \
+            --proxy-user evil:live \
+            --connect-timeout 3 \
+            --max-time 3 \
+            https://www.cloudflare.com/robots.txt
+
+      - name: Stop container
+        run: docker stop $(docker ps -a --filter ancestor=3proxy:local -q)

.gitignore

@@ -1,44 +1,3 @@
-# Windows image file caches
-Thumbs.db
-ehthumbs.db
-
-# Folder config file
-Desktop.ini
-
-# Recycle Bin used on file shares
-$RECYCLE.BIN/
-
-# Windows Installer files
-*.cab
-*.msi
-*.msm
-*.msp
-
-# Windows shortcuts
-*.lnk
-
-# =========================
-# Operating System Files
-# =========================
-
-# OSX
-# =========================
-
-.DS_Store
-.AppleDouble
-.LSOverride
-
-# Thumbnails
-._*
-
-# Files that might appear on external disk
-.Spotlight-V100
-.Trashes
-
-# Directories potentially created on remote AFP share
-.AppleDB
-.AppleDesktop
-Network Trash Folder
-Temporary Items
-.apdisk
-.jenkins-external
+## IDEs
+/.vscode
+/.idea

3proxy.cfg.json

@@ -0,0 +1,23 @@
+{
+  "log": {
+    "output": "/dev/stdout"
+  },
+  "name_servers": [
+    "${PRIMARY_RESOLVER:-1.0.0.1}",
+    "${SECONDARY_RESOLVER:-8.8.4.4}",
+    "1.1.1.1",
+    "9.9.9.9",
+    "8.8.8.8"
+  ],
+  "name_servers_cache": 65536,
+  "max_connections": "${MAX_CONNECTIONS:-1024}",
+  "auth": {
+    "login": "${PROXY_LOGIN:-}",
+    "password": "${PROXY_PASSWORD:-}",
+    "extra_accounts": ${EXTRA_ACCOUNTS:-{}}
+  },
+  "ports": {
+    "proxy": "${PROXY_PORT:-7860}",
+    "socks": "${SOCKS_PORT:-1080}"
+  }
+}

3proxy.cfg.mustach

@@ -0,0 +1,33 @@
+#!/bin/3proxy
+config /etc/3proxy/3proxy.cfg
+
+# you may use system to execute some external command if proxy starts
+system "echo `which 3proxy`': Starting 3proxy'"
+
+# We can configure nservers to avoid unsafe gethostbyname() usage (max 5 servers)
+{{#name_servers}}
+nserver {{ . }}
+{{/name_servers}}
+
+# nscache is good to save speed, traffic and bandwidth
+nscache {{ name_servers_cache }}
+
+# Here we can change timeout values
+timeouts 1 5 30 60 180 1800 15 60
+
+# Logging docs: <https://3proxy.org/doc/howtor.html#LOGFORMAT>
+log {{ log.output }}
+logformat "-\""+_G{""time_unix"":%t, ""proxy"":{""type:"":""%N"", ""port"":%p}, ""error"":{""code"":""%E""}, ""auth"":{""user"":""%U""}, ""client"":{""ip"":""%C"", ""port"":%c}, ""server"":{""ip"":""%R"", ""port"":%r}, ""bytes"":{""sent"":%O, ""received"":%I}, ""request"":{""hostname"":""%n""}, ""message"":""%T""}"
+
+maxconn {{ max_connections }}
+
+{{^auth.login=}}{{^auth.password=}}
+users {{ auth.login }}:CL:{{ auth.password }}{{#auth.extra_accounts.*}} {{ * }}:CL:{{ . }}{{/auth.extra_accounts.*}}
+auth strong
+allow {{ auth.login }}{{#auth.extra_accounts.*}},{{ * }}{{/auth.extra_accounts.*}}
+{{/auth.password=}}{{/auth.login=}}
+
+proxy -a -p{{ ports.proxy }}
+socks -a -p{{ ports.socks }}
+
+flush

CHANGELOG.md

@@ -0,0 +1,111 @@
+# Changelog
+
+All notable changes to this package will be documented in this file.
+
+The format is based on [Keep a Changelog][keepachangelog] and this project adheres to [Semantic Versioning][semver].
+
+## v1.8.2
+
+### Removed
+
+- `ppc64le` architecture support
+
+## v1.8.1
+
+### Added
+
+- Multi-arch image support (plus `arm64` and `ppc64le`) [#31]
+
+### Fixed
+
+- Error page colors now depend on the theme, and the text is centered [#31]
+
+[#31]:https://github.com/tarampampam/3proxy-docker/pull/31
+
+## v1.8.0
+
+### Added
+
+- `EXTRA_ACCOUNTS` environment variable is supported now [#28]
+
+[#28]:https://github.com/tarampampam/3proxy-docker/issues/28
+
+## v1.7.0
+
+### Added
+
+- The following environment variables are supported now: `MAX_CONNECTIONS`, `PROXY_PORT`, `SOCKS_PORT`
+
+### Changed
+
+- Entrypoint script (`bash`) replaced with [`mustpl`](https://github.com/tarampampam/mustpl)
+- The result docker image `busybox:1.34.1-glibc` replaced with `busybox:stable-glibc`
+
+### Removed
+
+- Dockerfile healthcheck
+
+## v1.6.0
+
+### Added
+
+- Possibility of changing DNS resolvers using environment variables `PRIMARY_RESOLVER` (primary) and `SECONDARY_RESOLVER` (secondary)
+
+## v1.5.0
+
+### Fixed
+
+- Docker image building optimized
+
+### Added
+
+- Healthcheck in the dockerfile
+
+## v1.4.0
+
+### Changed
+
+- 3proxy updated from `0.9.3` up to `0.9.4`
+
+## v1.3.0
+
+### Changed
+
+- Logging in JSON format
+
+## v1.2.0
+
+### Changed
+
+- 3proxy updated from `0.8.13` up to `0.9.3`
+
+## v1.1.0
+
+### Removed
+
+- Environment variable `AUTH_REQUIRED` support
+
+### Changed
+
+- Proxy error pages a little bit styled
+
+## v1.0.0
+
+### Fixed
+
+- Dockerfile and docker entry-point script cleanup
+
+## v0.1.1
+
+### Fixed
+
+- Docker entry-point script clean
+
+## v0.1.0
+
+### Changed
+
+- First project release
+
+[keepachangelog]:https://keepachangelog.com/en/1.0.0/
+[semver]:https://semver.org/spec/v2.0.0.html

Dockerfile

@@ -1,82 +1,89 @@
-# setup build arguments for version of dependencies to use
-ARG DOCKER_GEN_VERSION=0.10.3
-ARG FOREGO_VERSION=v0.17.0
-
-# Use a specific version of golang to build both binaries
-FROM golang:1.20.3 as gobuilder
-
-# Build docker-gen from scratch
-FROM gobuilder as dockergen
-
-ARG DOCKER_GEN_VERSION
-
-RUN git clone https://github.com/nginx-proxy/docker-gen \
-   && cd /go/docker-gen \
-   && git -c advice.detachedHead=false checkout $DOCKER_GEN_VERSION \
-   && go mod download \
-   && CGO_ENABLED=0 GOOS=linux go build -ldflags "-X main.buildVersion=${DOCKER_GEN_VERSION}" ./cmd/docker-gen \
-   && go clean -cache \
-   && mv docker-gen /usr/local/bin/ \
-   && cd - \
-   && rm -rf /go/docker-gen
-
-# Build forego from scratch
-FROM gobuilder as forego
-
-ARG FOREGO_VERSION
-
-RUN git clone https://github.com/nginx-proxy/forego/ \
-   && cd /go/forego \
-   && git -c advice.detachedHead=false checkout $FOREGO_VERSION \
-   && go mod download \
-   && CGO_ENABLED=0 GOOS=linux go build -o forego . \
-   && go clean -cache \
-   && mv forego /usr/local/bin/ \
-   && cd - \
-   && rm -rf /go/forego
-
-# Build the final image
-FROM nginx:1.23.4
-
-ARG NGINX_PROXY_VERSION
-# Add DOCKER_GEN_VERSION environment variable
-# Because some external projects rely on it
-ARG DOCKER_GEN_VERSION
-ENV NGINX_PROXY_VERSION=${NGINX_PROXY_VERSION} \
-   DOCKER_GEN_VERSION=${DOCKER_GEN_VERSION} \
-   DOCKER_HOST=unix:///tmp/docker.sock
-
-# Install wget and install/updates certificates
-RUN apt-get update \
-   && apt-get install -y -q --no-install-recommends \
-   ca-certificates \
-   wget \
-   && apt-get clean \
-   && rm -r /var/lib/apt/lists/*
-
-
-# Configure Nginx
-RUN echo "daemon off;" >> /etc/nginx/nginx.conf \
-   && sed -i 's/worker_processes  1/worker_processes  auto/' /etc/nginx/nginx.conf \
-   && sed -i 's/worker_connections  1024/worker_connections  10240/' /etc/nginx/nginx.conf \
-   && mkdir -p '/etc/nginx/dhparam'
-
-# Install Forego + docker-gen
-COPY --from=forego /usr/local/bin/forego /usr/local/bin/forego
-COPY --from=dockergen /usr/local/bin/docker-gen /usr/local/bin/docker-gen
-
-COPY network_internal.conf /etc/nginx/
-
-RUN adduser -h /home/user -s /bin/sh -D user
-USER user
-ENV HOME=/home/user \
-	PATH=/home/user/.local/bin:$PATH
-
-COPY --chown=user app nginx.tmpl $HOME/app/
-WORKDIR $HOME/app/
-RUN chmod 777 $HOME/app/docker-entrypoint.sh
-
-EXPOSE 7860
-
-ENTRYPOINT ["/home/user/app/docker-entrypoint.sh"]
-CMD ["forego", "start", "-r"]
+# Image page: <https://hub.docker.com/_/gcc>
+FROM gcc:12.2.0 as builder
+
+# renovate: source=github-tags name=z3APA3A/3proxy
+ARG Z3PROXY_VERSION=0.9.4
+
+# Fetch 3proxy sources
+RUN set -x \
+    && git -c advice.detachedHead=false clone --depth 1 --branch "${Z3PROXY_VERSION}" https://github.com/z3APA3A/3proxy.git /tmp/3proxy
+
+WORKDIR /tmp/3proxy
+
+# Patch sources
+RUN set -x \
+    && echo '#define ANONYMOUS 1' >> ./src/3proxy.h \
+    # proxy.c source: <https://github.com/z3APA3A/3proxy/blob/0.9.3/src/proxy.c>
+    && sed -i 's~\(<\/head>\)~<style>:root{--color-bg-primary:#fff;--color-text-primary:#131313;--color-text-secondary:#232323}\
+@media (prefers-color-scheme: dark){:root{--color-bg-primary:#212121;--color-text-primary:#fafafa;--color-text-secondary:#bbb}}\
+html,body{height:100%;font-family:sans-serif;background-color:var(--color-bg-primary);color:var(--color-text-primary);margin:0;\
+padding:0;text-align:center}body{align-items:center;display:flex;justify-content:center;flex-direction:column;height:100vh}\
+h1,h2{margin-bottom:0;font-size:2.5em}h2::before{content:'"'"'Proxy error'"'"';display:block;font-size:.4em;\
+color:var(--color-text-secondary);font-weight:100}h3,p{color:var(--color-text-secondary)}</style>\1~' ./src/proxy.c \
+    && cat ./src/proxy.c | grep '</head>'
+
+# And compile
+RUN set -x \
+    && echo "" >> ./Makefile.Linux \
+    && echo "PLUGINS = StringsPlugin TrafficPlugin PCREPlugin TransparentPlugin SSLPlugin" >> ./Makefile.Linux \
+    && echo "LIBS = -l:libcrypto.a -l:libssl.a -ldl" >> ./Makefile.Linux \
+    && make -f Makefile.Linux \
+    && strip ./bin/3proxy \
+    && strip ./bin/StringsPlugin.ld.so \
+    && strip ./bin/TrafficPlugin.ld.so \
+    && strip ./bin/PCREPlugin.ld.so \
+    && strip ./bin/TransparentPlugin.ld.so \
+    && strip ./bin/SSLPlugin.ld.so
+
+# Prepare filesystem for 3proxy running
+FROM alpine:latest as buffer
+
+# create a directory for the future root filesystem
+WORKDIR /tmp/rootfs
+
+# prepare the root filesystem
+RUN set -x \
+    && mkdir -p ./etc ./bin ./usr/local/3proxy/libexec ./etc/3proxy \
+    && echo '3proxy:x:1000:1000::/nonexistent:/sbin/nologin' > ./etc/passwd \
+    && echo '3proxy:x:1000:' > ./etc/group \
+    && apk add --no-cache --virtual .build-deps curl ca-certificates \
+    && update-ca-certificates \
+    && curl -SsL -o ./bin/dumb-init "https://github.com/Yelp/dumb-init/releases/download/v1.2.5/dumb-init_1.2.5_$(arch)" \
+    && chmod +x ./bin/dumb-init \
+    && apk del .build-deps
+
+COPY --from=builder /lib/*-linux-gnu/libdl.so.* ./lib/
+COPY --from=builder /tmp/3proxy/bin/3proxy ./bin/3proxy
+COPY --from=builder /tmp/3proxy/bin/*.ld.so ./usr/local/3proxy/libexec/
+COPY --from=ghcr.io/tarampampam/mustpl:0.1.0 /bin/mustpl ./bin/mustpl
+COPY 3proxy.cfg.json ./etc/3proxy/3proxy.cfg.json
+COPY 3proxy.cfg.mustach ./etc/3proxy/3proxy.cfg.mustach
+
+RUN chown -R 1000:1000 ./etc/3proxy
+
+# Merge into a single layer
+FROM busybox:stable-glibc
+
+LABEL \
+    org.opencontainers.image.title="3proxy" \
+    org.opencontainers.image.description="Tiny free proxy server" \
+    org.opencontainers.image.url="https://github.com/tarampampam/3proxy-docker" \
+    org.opencontainers.image.source="https://github.com/tarampampam/3proxy-docker" \
+    org.opencontainers.image.vendor="Tarampampam" \
+    org.opencontainers.image.licenses="WTFPL"
+
+# Import from builder
+COPY --from=buffer /tmp/rootfs /
+
+# Use an unprivileged user
+USER 3proxy:3proxy
+
+ENTRYPOINT [ \
+    "/bin/mustpl", \
+    "-f", "/etc/3proxy/3proxy.cfg.json", \
+    "-o", "/etc/3proxy/3proxy.cfg", \
+    "/etc/3proxy/3proxy.cfg.mustach", \
+    "--", "/bin/dumb-init" \
+]
+
+CMD ["/bin/3proxy", "/etc/3proxy/3proxy.cfg"]

LICENSE

@@ -1,674 +1,9 @@
-                    GNU GENERAL PUBLIC LICENSE
-                       Version 3, 29 June 2007
+Copyright (C) tarampampam <github.com/tarampampam>
 
- Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
- Everyone is permitted to copy and distribute verbatim copies
- of this license document, but changing it is not allowed.
+Everyone is permitted to copy and distribute verbatim or modified copies of this license
+document, and changing it is allowed as long as the name is changed.
 
-                            Preamble
+DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE TERMS AND CONDITIONS FOR COPYING,
+DISTRIBUTION AND MODIFICATION
 
-  The GNU General Public License is a free, copyleft license for
-software and other kinds of works.
-
-  The licenses for most software and other practical works are designed
-to take away your freedom to share and change the works.  By contrast,
-the GNU General Public License is intended to guarantee your freedom to
-share and change all versions of a program--to make sure it remains free
-software for all its users.  We, the Free Software Foundation, use the
-GNU General Public License for most of our software; it applies also to
-any other work released this way by its authors.  You can apply it to
-your programs, too.
-
-  When we speak of free software, we are referring to freedom, not
-price.  Our General Public Licenses are designed to make sure that you
-have the freedom to distribute copies of free software (and charge for
-them if you wish), that you receive source code or can get it if you
-want it, that you can change the software or use pieces of it in new
-free programs, and that you know you can do these things.
-
-  To protect your rights, we need to prevent others from denying you
-these rights or asking you to surrender the rights.  Therefore, you have
-certain responsibilities if you distribute copies of the software, or if
-you modify it: responsibilities to respect the freedom of others.
-
-  For example, if you distribute copies of such a program, whether
-gratis or for a fee, you must pass on to the recipients the same
-freedoms that you received.  You must make sure that they, too, receive
-or can get the source code.  And you must show them these terms so they
-know their rights.
-
-  Developers that use the GNU GPL protect your rights with two steps:
-(1) assert copyright on the software, and (2) offer you this License
-giving you legal permission to copy, distribute and/or modify it.
-
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-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-Also add information on how to contact you by electronic and paper mail.
-
-  If the program does terminal interaction, make it output a short
-notice like this when it starts in an interactive mode:
-
-    <program>  Copyright (C) <year>  <name of author>
-    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
-    This is free software, and you are welcome to redistribute it
-    under certain conditions; type `show c' for details.
-
-The hypothetical commands `show w' and `show c' should show the appropriate
-parts of the General Public License.  Of course, your program's commands
-might be different; for a GUI interface, you would use an "about box".
-
-  You should also get your employer (if you work as a programmer) or school,
-if any, to sign a "copyright disclaimer" for the program, if necessary.
-For more information on this, and how to apply and follow the GNU GPL, see
-<https://www.gnu.org/licenses/>.
-
-  The GNU General Public License does not permit incorporating your program
-into proprietary programs.  If your program is a subroutine library, you
-may consider it more useful to permit linking proprietary applications with
-the library.  If this is what you want to do, use the GNU Lesser General
-Public License instead of this License.  But first, please read
-<https://www.gnu.org/licenses/why-not-lgpl.html>.
+0. You just DO WHAT THE FUCK YOU WANT TO.