Add PYTHONPATH and bind mount for migrations

Dockerfile

@@ -60,6 +60,7 @@ ENV PYTHONDONTWRITEBYTECODE=1 \
     PYTHONUNBUFFERED=1 \
     PYTHONFAULTHANDLER=1 \
     PATH="/home/appuser/.local/bin:$PATH" \
+    PYTHONPATH="/usr/src/app:$PYTHONPATH" \
     PYTHON_LIB="/home/appuser/.local/lib/python$PYTHON_IMG_TAG/site-packages" \
     SSL_CERT_FILE=/etc/ssl/certs/ca-certificates.crt \
     REQUESTS_CA_BUNDLE=/etc/ssl/certs/ca-certificates.crt

docker-compose.yml

@@ -40,6 +40,7 @@ services:
       - ./pyproject.toml:/usr/src/app/pyproject.toml:ro
       - ./backend:/usr/src/app/backend:ro
       - ./tests:/usr/src/app/tests:ro
+      - ./migrations:/src/migrations
     restart: unless-stopped
     healthcheck:
       test: curl --fail http://localhost:5000 || exit 1