Add docker-compose to README

README.md

@@ -42,6 +42,20 @@ It is a temporary live demo, all data will be deleted after 10 minutes. Use the
 docker run -d --restart=always -p 3001:3001 -v uptime-kuma:/app/data --name uptime-kuma louislam/uptime-kuma:1
 ```
 
+### 🐳 Docker Compose
+```yaml
+version: "3"
+
+services:
+  uptime-kuma:
+    image: louislam/uptime-kuma:1
+    restart: always
+    ports:
+      - "3001:3001"
+    volumes:
+      - uptime-kuma:/app/data
+```
+
 ⚠️ Please use a **local volume** only. Other types such as NFS are not supported.
 
 Kuma is now running on http://localhost:3001