Create a docker-compose or other service-combination to allow userdb/oauth isolation

[ryanrdoherty]

SiteSearchData is a stand-alone WDK implementation that should not need to access our global OAuth server or any "real" Oracle user database to do its job. We could probably rig up a system that creates a containerized OAuth and/or userdb that can create and use user IDs in a completely independent value-space from our real user IDs. Possible implementations are containerized versions of OAuth and a postgres user DB. But even simpler may be a SQLite for user DB and an independently running OAuth with a dummy authenticator (and AtomicInteger counter to produce user IDs). Might be less work than it seems.