Problem when building localhost tunnel #8
Description
After I finished building the chat app following your awesome tutorial (with nodejs backend + react frontend), I could already access the app by using "localhost:3000" from my computer (or using "IP_Adress:3000" for devices on the same WLAN). Then, I attempted to access the app from outside of my local network, and I found on the Internet that I had to establish a localhost tunnel.
I used the free tunnels on localhost.run to establish a publicly-accessible URL, but the page reads that [this page is not working]. However, I can confirm that the tunnel was working properly since when I stopped the tunnel in my terminal, the [not working page] then reads [no tunnel here :( ]
I believe that the problem lies with the port number 3000. When I try to open tunnels for arbitrary localhost ports such as 1234 or 5555, the results were the same as before. However, when I opened a localhost tunnel for port 3001 (which is the only port refered to in the code), I get a page reading [Cannot GET /], which makes me wonder why the final actionable localhost is 3000 on my computer when the code has never referred to this port.
Two questions in summary
- Why does the app run on [localhost:3000] when the code only referred to port 3001
- How correctly establish the tunnel for the app's public internet access