Leon Klingele 567cda4cd3
docker: use alpine:edge base image for building
This fixes currently failing Docker builds.
kemalcr/kemal in version 0.26.0 requires Crystal 0.30.0 which is not
yet available on Alpine 3.10 (previously used as the Docker base image).
2019-08-15 01:37:25 +02:00
..