Update appbf.py

appbf.py

@@ -252,5 +252,5 @@ def write_to_file():
 
     return jsonify({"message": "Content written to file successfully."})
 
-if __name__ == '__main__':
-    app.run(host='0.0.0.0')
+if __name__ == "__main__":
+    app.run(host="0.0.0.0", port=7860)