Unable to connect to dockerhost from internet

I am trying to implement an example voting application demo in the docker playground , but iam unable to test the output . When i try to access the application by giving docker host ip address in my browser along with the corresponding port , it says it cannot reach the page.

is there anyway to carry out the tests , if there is no connectivity from dockerhost to internet ?

Click on the Options (three vertical lines) and then click on the view port. There mention the port your web application is connected. Click on view port. a new tab will open with your webapp