docker nginx 启动失败，报错 listen tcp 0.0.0.0:80: bind: address already in use

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详细错误如下：

Starting new_nginx_1 ... 
Starting new_nginx_1 ... error

ERROR: for new_nginx_1  Cannot start service nginx: driver failed programming external connectivity on endpoint new_nginx_1 (ec53e5b0f4bStarting new_cas_1 ... done
Starting new_account-manager_1 ... done

ERROR: for nginx  Cannot start service nginx: driver failed programming external connectivity on endpoint new_nginx_1 (ec53e5b0f4b03674cc7a8fa8c6bef5fdc71cca295d02f25b78d34a5298d3d84c): Error starting userland proxy: listen tcp 0.0.0.0:80: bind: address already in use
ERROR: Encountered errors while bringing up the project.
 

原因：

开机时 apache2 自动启动，占用了80端口。

解决方法：

service apache2 stop