Include metadata.json

[trieloff]

From #2 (review)

@davidnuescheler ideally, we could also consider the existence of a metadata.json as config. i.e. just add a:

"metadata": "/metadata.json`

entry. so we don't need to fetch a 404 if there is none.

[tripodsan]

I suggest:

"metadata": {
  "path": "/metadata.json"
}

[trieloff]

Why not inline it?

[rofe]

Because it can potentially be gigantic...

[tripodsan]

Why not inline it?

and because it's content and changes often. so we don't have triggers to copy it to the code-bus