Split dockerfile into three different dockerfiles such that dependencies
are only downloaded once
This allows the build to be a bit faster, since all deps are downloaded
once at the start.
This also makes it so the frontend container no longer needs to be ran,
as its files are directly embedded into the nginx container
This also remove the extra files, since bind mounts do work
it also remove the entrypoint.sh file, as you should prefer to not use
it
