Add php zip to tdgroot/hypernode-build-docker

[rvr31]

@tdgroot could you add the PHP Zip extension to the docker for the build server?

The following message now pops up:

➤ Executing task deploy:vendors
To speed up composer installation setup "unzip" command with PHP zip extension https://goo.gl/sxzFcD

[tdgroot]

The php zip extension is already installed, so you should be able to setup the unzip command.