fix: flask-mongo quickstart local mongo setup (#624)

Signed-off-by: Achanandhi-M <[email protected]>

Author: Achanandhi-M

versioned_docs/version-3.0.0/quickstart/python-flask-mongo.md

@@ -214,12 +214,14 @@ We'll be running our sample application right on Linux, but just to make things
 pip install -r requirements.txt
 ```
 
-## Start the MongoDB server
+## Start the MongoDB container
 
 ```bash
-sudo service mongod start
+docker run -p 27017:27017 -d --network backend --name mongo mongo
 ```
 
+> **Since we are using a MongoDB container, we need to update the `client` on line 11 in `app.py`, to `localhost`.**
+
 ## Lights, Camera, Record! 🎥
 
 To initiate the recording of API calls, execute this command in your terminal: