docker执行node的image后，端口号不存在，container状态为stopped

请问，
docker run image后，通过docker ps -l查看运行情况，结果没看到端口号(ports为空)
查看日志：

[root@xxx ~]# docker logs --since 30m some-app
> star@1.0.0 start /app
> egg-scripts start --daemon --title=egg-server-star
[egg-scripts] Starting egg application at /app
[egg-scripts] Run node /app/node_modules/egg-scripts/lib/start-cluster {"title":"egg-server-star","baseDir":"/app","framework":"/app/node_modules/egg"} --title=egg-server-star
[egg-scripts] Save log file to /root/logs
[egg-scripts] Wait Start: 1...
[egg-scripts] egg started on h防止ttp://127.0.0.1:7001


docker并没有启动起来
求助，请大侠帮忙
附上dockerfile
FROM node:latest

ENV PROJECT_DIR=/app
WORKDIR $PROJECT_DIR

COPY package.json $PROJECT_DIR
RUN npm install
COPY . $PROJECT_DIR

ENV MEDIA_DIR=/media \
    NODE_ENV=production \
    APP_PORT=7001

VOLUME $MEDIA_DIR
EXPOSE $APP_PORT
HEALTHCHECK CMD curl --fail http://localhost:$APP_PORT || exit 1

RUN ["chmod", "+x", "./entrypoint.sh"]
ENTRYPOINT ["./entrypoint.sh"]
CMD ["start"]