Open these in the browser (same host and port you use now, e.g.
http://127.0.0.1:8000/...):
.env (never commit secrets).
Health
GET /api/v1/health - always OK if app runs
Database check
GET /api/v1/health/ready
If you see {"detail":"Not Found"}, you opened a path that does not exist.
There is no JSON API at / by design - use the links above.