fix 4000 listening port in docker-compose
The listening port in api container in docker-compose was 4001, but the actual HTTP/S port for Mobilizon is 4000. This change just links the port 4000 on host to the port 4000 on the container.
The listening port in api container in docker-compose was 4001, but the actual HTTP/S port for Mobilizon is 4000. This change just links the port 4000 on host to the port 4000 on the container.