Fix config path name, add dockerfile, add workflow.

README.md

@@ -109,5 +109,14 @@ docker run --volume ./config:/etc/osc-mqtt-bridge --publish 2223:2223/udp osc-mq
 
 ### Docker compose
 ```yaml
+version: '2.3'
 
+services:
+  postgres:
+    image: grmrgecko/osc-mqtt-bridge:latest
+    restart: unless-stopped
+    volumes:
+      - ./config:/etc/osc-mqtt-bridge
+    ports:
+      - "2223:2223/udp"
 ```