[Compose] Update dockerapi-mailcow, base image is now Alpine 3.8, fixes #1767

docker-compose.yml

@@ -356,7 +356,7 @@ services:
             - watchdog
 
     dockerapi-mailcow:
-      image: mailcow/dockerapi:1.13
+      image: mailcow/dockerapi:1.14
       restart: always
       build: ./data/Dockerfiles/dockerapi
       oom_kill_disable: true