Use caches and staged builds in docker images and use buildkit in the CI #69
+338
−218
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This PR adds staged builds to the docker images for the API and app, so that hot-reloading dev servers can also be used locally with Docker-based development environments.
It also:
I tried for hours to get layer caching to work between runs, but tools either support buildkit or docker-compose (not both) and even loading from the cache itself is a bit slow (see https://github.com/docker/build-push-action/blob/master/docs/advanced/cache.md). When we go open source, we could use GitHub's free container registry as a cache.