Locally, I can access one of my local website using http://localhost
.
Now, I would like to share this website on the internet.
(By the way, this is not the way to deploy your site, only to share temporarily).
Using the command line, I use ngrok
like this:
patou@pa-linux:~$ ./ngrok-stable-linux-amd64/ngrok http 80
This results in a display like the following:

What I see, from the image you uploaded, is that you try to access your website using http://localhost
from the internet.
You do not access you site from outside as localhost
but as the random name provided by ngrok
. Here it is http://19cfca2ea9c5.ngrok.io
. It will work better