feat(services): add facultative watchtower service

README.md

@@ -70,6 +70,7 @@ The repository currently supports these message brokers:
 
  - rabbitmq 3.8
 
+An optional watchtower service is available to update docker images automatically. Add `watchtower.yml` to `COMPOSE_FILE` variable and set a schedule with `WATCHTOWER_SCHEDULE` variable in your `.env` file (default is `0 0 17 * * *`). You should also [login to your docker hub account](https://docs.docker.com/security/for-developers/access-tokens/#create-an-access-token) to prevent rate limit issues.
 
 ## Troubleshooting
 

watchtower.yml

@@ -0,0 +1,9 @@
+services:
+  watchtower:
+    image: containrrr/watchtower
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock
+      - /etc/localtime:/etc/localtime:ro
+    restart: always
+    environment:
+      WATCHTOWER_SCHEDULE: ${WATCHTOWER_SCHEDULE-0 0 17 * * *}