the message changes if I set the port to 3366, or databse to localhost vs db...
ps gives this:
$ docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                    NAMES
79d16b9edde8        farmos/farmos:dev   "docker-entrypoint.s…"   About an hour ago   Up About an hour    0.0.0.0:80->80/tcp       farmos_www_1
9b9c36983a5a        mariadb:latest      "docker-entrypoint.s…"   About an hour ago   Up About an hour    0.0.0.0:3306->3306/tcp   farmos_db_1