Add README

.github/workflows/sync-hf.yml

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+name: Sync to Hugging Face hub
+on:
+  push:
+    branches: [main]
+
+  # to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+jobs:
+  sync-to-hub:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          lfs: true
+      - name: Push to hub
+        env:
+          HF_TOKEN: ${{ secrets.HF_TOKEN }}
+        run: git push --force https://giswqs:$HF_TOKEN@huggingface.co/spaces/giswqs/tn-historical-imagery main

.pre-commit-config.yaml

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+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.6.0
+    hooks:
+      - id: check-toml
+      - id: check-yaml
+      - id: end-of-file-fixer
+        types: [python]
+      - id: trailing-whitespace
+      - id: requirements-txt-fixer
+      - id: check-added-large-files
+        args: ["--maxkb=500"]
+
+  - repo: https://github.com/psf/black
+    rev: 24.8.0
+    hooks:
+      - id: black-jupyter
+
+  - repo: https://github.com/codespell-project/codespell
+    rev: v2.3.0
+    hooks:
+      - id: codespell
+        args: ["--ignore-words-list=gis,timeseries,ned", "--skip=*.json,*.csv"]
+
+  - repo: https://github.com/kynan/nbstripout
+    rev: 0.7.1
+    hooks:
+      - id: nbstripout

README.md

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+---
+title: Tennessee Historical Imagery
+emoji: 🌐
+colorFrom: green
+colorTo: red
+sdk: docker
+pinned: false
+license: mit
+app_port: 8765
+---
+
+## TN-historical-imagery
+
+An interactive web app for visualizing Tennessee historical imagery.
+
+- Web App: <https://giswqs-tn-historical-imagery.hf.space>
+- GitHub: <https://github.com/giswqs/tn-historical-imagery>
+- Hugging Face: <https://huggingface.co/spaces/giswqs/tn-historical-imagery>