R015

A required live query, and the server's startup probe found no real change feed (a pooler, no trigger, no trigger permission, a Mongo without a replica set): the server stops rather than serve stale data, and dev answers 503.

Fix: What the error names: dbChanges(db, tables, { listenUrl }) for a direct connection, weft db live for triggers.

Status in weft@0.1.0: reported by @weft-js/start when it serves or renders the route, and by weft check and weft routes --meta.