Add port configuration to v1 for ALLIES partners

Summary

An ALLIES partner is trying to use beat.editor across an SSH connection and needs better control over the ports used for beat.editor. Right now the editor just uses port 5000 for serving the API/static files (python code) & for querying the API (JS code).

What does it provide?

Port configuration sufficient for the partner.

Relevant links / references

See https://groups.google.com/d/msg/beat-devel/m9vCN1J6I8E/pA9smNcXEgAJ

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