I can't run flask app in my host browser

Docker
#1

I tried calling the flask app using the ip of my host with port 8080. I cant see the application running in my browser, Please help.

#2

And how you are performing that process? means from Docker?

#3

I ran the application as it is in the video lecture. Instructor ran flask server and then he opened the browser in the host type ip address:8080 it worked for him. Me too did the same way. But my browser is not running the Hello world!!!. My server also started as it was in the lecture.

#4

What commands and which ip you choose to access in your browser?