static assets
middleware
view engine
internationalization
uploads & universal path
CLI - view routes, template generation, start server, directives, output, args
request level error handler
develop/prod/debug modes
logger scope (e.g. logger.verbose())
favicon
utility - root, path, is_windows, is_linux, is_mac
authentication - user/session, oauth, jwt, &c.
orm relations, subqueries, enum/bit fields, json handlers, scopes
redis - redis client, redis rehydrated classes, redis sessions
less/scss
notifications - gotify/push/other mechanisms
forms
job queue - redis/db backed?
comment all the things
unit tests
integration tests
documentation & docs site
events and observables?
error response handler figure out json - requested content type