fix: resolve static files and import issues

- Fix static files not loading due to volume mount conflict
- Remove problematic volume mount from docker-compose.yml
- Add __init__.py files to make Python packages
- Fix all import statements to use relative imports
- Update start.sh to use correct module name
- Update config.py with correct default paths and values
- Ensure all environment variables are properly loaded from .env file

app/core/auth.py

@@ -15,7 +15,7 @@ from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
 from passlib.context import CryptContext
 import jwt
 
-from app.core.config import (
+from core.config import (
     SECRET_KEY, 
     ALGORITHM, 
     ACCESS_TOKEN_EXPIRE_MINUTES,