revert port number change

main.py

@@ -68,4 +68,4 @@ def handle_bad_request(e):
 import_pages("routes", app)
 
 if __name__ == "__main__":
-    app.run(host="0.0.0.0", port=3001, debug=True)
+    app.run(host="0.0.0.0", port=3000, debug=True)