Features
- one: [experimental] allow customizing the app dir name #538 (Pokai Chang)
Bug Fixes
- one: fix hard-coded app dir in multiple places #538 (Pokai Chang)
- fix assets broken on prod when a root not-found route exists (#539) #539 (Pokai Chang)
- one: fix API routes under groups not working on prod (#540) #540 (Pokai Chang)
Tests
- add basic app test case leveraging custom router root #538 (Pokai Chang)
- add more tests for customizing the app dir name #538 (Pokai Chang)