Lots of changes to support Alembic and external DB

backend/Dockerfile

@@ -19,8 +19,11 @@ RUN pip install --no-cache-dir -r requirements.txt
 # Copy application code
 COPY . .
 
+# Make entrypoint executable
+RUN chmod +x /app/entrypoint.sh
+
 # Expose port
 EXPOSE 8000
 
-# Run the application
-CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]
+# Use entrypoint script
+ENTRYPOINT ["/app/entrypoint.sh"]