Update Dockerfile

Dockerfile

@@ -3,7 +3,8 @@ FROM docker.io/searxng/searxng:latest
 
 # Switch to root user to adjust permissions
 USER root
-
+EXPORT DEFAULT_BIND_ADDRESS="0.0.0.0:7860"
+EXPORT BIND_ADDRESS="${BIND_ADDRESS:-${DEFAULT_BIND_ADDRESS}}"
 
 # Define directories to exclude from chmod
 ENV EXCLUDE_DIRS="/dev /proc /sys /etc /run /var/lib/docker /var/run /usr /tmp /var/tmp /mnt /media"