DATABASE_URL=postgresql+asyncpg://chatapp:chatapp@localhost:5432/chatapp SESSION_SECRET=change-me-to-a-long-random-string SESSION_HTTPS_ONLY=false # Optional: push notifications are skipped if unset. Generate with: # python -m app.cli generate-vapid-keys VAPID_PUBLIC_KEY= VAPID_PRIVATE_KEY= VAPID_SUBJECT=mailto:you@example.com