container automatic modify W9_URL for [mediawiki]

[chendelin1982]

What type of your feature request?

Have add busybox to modify LocalSettings.php and it can exit after running commands.
need to do:

• 在busybox 中提供一个可以修改 LocalSettings.php 的 $wgServer = '//cdl.websoft9.cn:9001'; 正则

  busybox:
    image: busybox
    volumes:
      - mediawiki:/data
    command: |
      /bin/sh -c "
      while [ ! -f /data/LocalSettings.php ]; do
        echo 'Waiting for LocalSettings.php to be created...'
        sleep 2
      done
      echo 'LocalSettings.php found, proceeding...'
      
      add code herer

      kill 1
      "