Not working on macOS Catalina

[HovhannesHovakimyan]

Hi, here are the steps I did.

1. Installed NodeJS
2. Cloned this repo
3. npm install express
4. npm install ejs
5. put my API key in server.js
6. node server.js
7. It says "Example app listening on port 3000!"

But http://localhost:3000 is not working...

These same steps on Windows 10 result in a working app, but not on macOS Catalina.
P.S. I tried sample NodeJS app, and it works well.

Can you help resolve this issue?