Serve context.jsonld from file system instead of http

[dr0i]

We experience sometimes (too) high usage of our web proxy. We will pimp that server, but meanwhile it would be good to avoid these kinds of crashes in future.
The cause:
It seems that if the context.jsonld cannot be loaded by the play app , it crashes (org.apache.jena.riot.RiotException: loading remote context failed: https://lobid.org/gnd/context.jsonld) . From the logs we see that our play app is loading the context.jsonld from this HTTP-URL. Play should load this context from the filesystem , avoiding the proxy , avoiding these kind of crashes.