fix docker compose config

.gitignore

@@ -2,6 +2,7 @@
 .env
 .env.*
 !.env.example
+docker-compose.yml
 
 # Runtime data
 data/*

README.md

@@ -74,6 +74,14 @@ The repository includes `.env.example` as a template. Never commit `.env`, the S
 
 ## Running with Docker
 
+The repository contains `docker-compose.example.yml` as a portable default configuration. Copy it to `docker-compose.yml` before starting the service:
+
+```bash
+cp docker-compose.example.yml docker-compose.yml
+```
+
+The copied `docker-compose.yml` is ignored by Git, so it can be customized locally without affecting the public repository. The example exposes port `8000` directly, which is convenient for a local installation.
+
 Build and start the service:
 
 ```bash
@@ -153,7 +161,7 @@ When possible, the response is saved under `data/diagnostics/` for investigation
 ├── static/               # static assets, including the favicon
 ├── templates/            # Jinja2 dashboard templates
 ├── Dockerfile
-├── docker-compose.yml
+├── docker-compose.example.yml
 ├── main.py
 ├── requirements.txt
 └── .env.example

docker-compose.example.yml

@@ -0,0 +1,13 @@
+services:
+  radiosync:
+    build: .
+    container_name: radiosync_hub
+    restart: unless-stopped
+    ports:
+      - "8000:8000"
+    volumes:
+      - ./data:/app/data
+    environment:
+      - TZ=Europe/Warsaw
+      - RADIOSYNC_SECRET_KEY=${RADIOSYNC_SECRET_KEY:?Set RADIOSYNC_SECRET_KEY in .env}
+      - RADIOSYNC_CONFIG_KEY=${RADIOSYNC_CONFIG_KEY:-}