Use debian based node images for qa tests
Use debian based node images for qa tests

The alpine images do not contain a full build toolchain, so if the
pre-compiled node-sass bindings cannot be downloaded, they will error
and break master. By switching to the debian based images, we are able
to compile in case the downloads are not available.

stoplightio/gitlabhq,mmkassem/gitlabhq,stoplightio/gitlabhq,mmkassem/gitlabhq,stoplightio/gitlabhq,stoplightio/gitlabhq,mmkassem/gitlabhq,mmkassem/gitlabhq