Updated docs

README.md

@@ -81,11 +81,39 @@ Every device is contacted once during each Prometheus scrape. Choose a scrape in
 
 ## Docker
 
+You can use the latest pre-built image from the registry:
+
+```sh
+docker pull gitea.lostak.dev/lostakj/shelly-exporter:latest
+```
+
+Or build it locally:
+
 ```sh
 docker build --rm -t shelly-exporter:latest .
+```
+
+Run the container:
+
+```sh
 docker run --rm -p 9090:9090 \
   -v "$PWD/config.yaml:/opt/shelly-exporter/config.yaml:ro" \
-  shelly-exporter:latest
+  gitea.lostak.dev/lostakj/shelly-exporter:latest
+```
+
+Example with docker-compose:
+
+```yaml
+version: '3.8'
+
+services:
+  shelly-exporter:
+    image: gitea.lostak.dev/lostakj/shelly-exporter:latest
+    ports:
+      - "9090:9090"
+    volumes:
+      - ./config.yaml:/opt/shelly-exporter/config.yaml:ro
+    restart: unless-stopped
 ```
 
 ## Scope