Docker vboxwebsrv with server local IP

This is a fork of the jazzdd86/phpVirtualbox

It solve a problem when vboxwebsrv is run on Virtualbox over internet.

This version adds one more argument

-e LOCAL_IP=<ip_address>

where ip_address is local IP address of server, which runs vboxwebsrv

example:

docker run -d --name=vbox_websrv --restart=always -e USE_KEY=1 -e SSH_PORT=12222 -e LOCAL_IP=192.168.200.10 -v /home/joe/ssh_keys:/root/.ssh/ user/vboxwebsrv user@10.20.30.40

Default value of LOCAL_IP is localhost