Docker fixes, zero-downtime deploys/rebuilds on change with pm2

-Dockerfile changes -pm2 for managing the Node processes in production. ZD deploys on change via post-merge git hook -automated restart on crash -production deployment instructions in README -fix local React dev issue where URLs in the UI pointed to techinqury.org rather than localhost -Allow connecting to the postgres instance in docker from a non-docker local dev node server.

@jack_poulson one additional question below: it's looking like some expected relations aren't present in the dockerized postgres DB (e.g., vendor_neighbors). How are migrations / updates to that handled?