We are embedding the assets as part of our build pipeline, and even
without that the embedded assets are generated by our `make generate`
task anyway, so let's remove thise huge amount of files from the
repository and generate it on build time.
So far Phoenix have been embedded into the binary and we can customize
the required config based on flags, env variables and optionally via
config file. For now I'm embedding the whole Phonix content, optherwise
the all-in-one binary `ocis` will get pretty complicated until we add
the generate commands to that repo as well and provide a mechanism to
inject the embedding.