WIP: Add CI tarball build
Finally found a stable yaml rule to use artifacts between stages (cache: doesn't work stable).
So here comes a build from tarball without the need of a fully configured development system. The CI image, an Alpine 3.8 minimal system, is already in build-images (MR is created when this code is finished).
The idea is to test if a build from tarball works for outside a development environment.
Edited by Tim Rühsen