Update api_server.py

api_server.py

@@ -131,6 +131,10 @@ if __name__ == "__main__":
 # =================================================================
 from sqlalchemy import create_engine
 from sqlalchemy.orm import sessionmaker, Session
+import sys
+import os
+sys.path.append(os.path.dirname(__file__))
+
 from models import Base, Patient, Nurse, Record
 
 DATABASE_URL = "sqlite:///./nursing.db"