This is a docker container to build Minecraft modpacks based on manifest.json files. It produces ZIP files for both the client and the server. The server file contains all mods while the client file only contains the manifest and overrides.
Run the container with your pack sources (containing a manifest.json and an overrides directory) mounted to /builder. The artifacts will be put into /builder/artifacts (named <slug>_<version>_<client|server>.zip).
docker run --rm -v /your/pack/location:/builder derenderkeks/modpack-builder