Mongo services in both compose files are now commented out (with instructions
to re-enable) since DB_ENGINE now defaults to sqlite - no separate database
container required out of the box. db-data volume is mounted into the app
service (not just mongo) so it can hold the SQLite file too.
Also fixes a require-order bug in tests/utils/express-app.js: routers were
required (eagerly instantiating DB singletons via dbFactory) before the test
env file was loaded, so DB_ENGINE from .env.test was silently never applied -
it only worked before because the old hardcoded default happened to be mongo.
oxmc
subnub