执行没报错 页面502 明显mysql和ghost都没起来

root@ubuntu:~/ghost# docker-compose up -d
Creating ghost_db_1
Creating ghost_ghost-app_1
Creating ghost_nginx_1
root@ubuntu:~/ghost# docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                NAMES
e5ed6df2bf15        ghost_nginx         "nginx -g 'daemon of…"   7 seconds ago       Up 6 seconds        0.0.0.0:80->80/tcp   ghost_nginx_1