make port customizable via env variable

Writerside/mm.tree

@@ -23,6 +23,7 @@
         <toc-element topic="qBittorrent-Category.md"/>
         <toc-element topic="Base-Path.md"/>
         <toc-element topic="metadata-provider-configuration.md"/>
+        <toc-element topic="Custom-port.md"/>
     </toc-element>
     <toc-element topic="troubleshooting.md"/>
     <toc-element topic="developer-guide.md"/>

Writerside/topics/Custom-port.md

@@ -0,0 +1,4 @@
+# Custom port
+
+With the env variable `PORT`, you can change the port that MediaManager listens on. The default port is `8000`.
+Note that this setting only works if you are using the Docker Image.

mediamanager-backend-startup.sh

@@ -54,4 +54,6 @@ echo "   Check the application logs for the login credentials."
 echo "   You can also register a new user and it will become admin if the email"
 echo "   matches one of the admin_emails in your config.toml"
 echo ""
-uv run fastapi run /app/media_manager/main.py --port 8000 --proxy-headers
+
+PORT=${PORT:-8000}
+uv run fastapi run /app/media_manager/main.py --port "$PORT" --proxy-headers