push alpine container to the proper repository
push alpine container to the proper repository

We want the alpine container to show up as a tag, not as its own repo.

Fixes #504

Signed-off-by: Olliver Schinagl <c539153ba1f947bd4b6f910263b967c4a0a62357@schinagl.nl>
mvdan/sh,mvdan/sh,mvdan/sh,mvdan/sh