The migrations/ directory was missing from the Dockerfile COPY instructions,
causing ModuleNotFoundError when app.main tries to import and run migrations
during startup. This caused production deployments to fail with:
ModuleNotFoundError: No module named 'migrations'
The automatic migration runner in main.py (line 157) needs this directory to:
1. Detect database schema changes
2. Run pending migrations
3. Initialize default admin user
Fixes production deployment failure when containers start.
Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
