convert to alpine-gitlab-ci

3 jobs for adopt-to-gitlab in 59 seconds (queued for 6 seconds)
Status Job ID Name Coverage
  Build
passed #474
docker-alpine s390x
build-s390x

00:00:59

passed #476
docker-alpine x86
build-x86

00:00:35

passed #475
docker-alpine x86_64
build-x86_64

00:00:28