Fix database URI to use SQLite and correct import in main.py

app.py

@@ -4,7 +4,7 @@ import os
 from werkzeug.utils import secure_filename
 
 app = Flask(__name__)
-app.config['SQLALCHEMY_DATABASE_URI'] = "postgresql://neondb_owner:npg_vz5FLSXfj2sp@ep-late-block-adp1o88t-pooler.c-2.us-east-1.aws.neon.tech/neondb?sslmode=require&channel_binding=require"
+app.config['SQLALCHEMY_DATABASE_URI'] = "sqlite:///courses.db"
 app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
 UPLOAD_FOLDER = 'static/uploads'
 app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER

main.py

@@ -1,10 +1,10 @@
-import os
-from api.index import app, db
+import os
+from app import app, db
 
 # Create database tables if they don't exist
 with app.app_context():
     db.create_all()
 
-if __name__ == '__main__':
-    port = int(os.environ.get("PORT", 5000))
-    app.run(host="0.0.0.0", port=port)
+if __name__ == '__main__':
+    port = int(os.environ.get("PORT", 5000))
+    app.run(host="0.0.0.0", port=port, debug=True)