Update doc/TUTORIAL.md

Co-Authored-By: Caleb Cartwright <calebcartwright@users.noreply.github.com>

doc/TUTORIAL.md

@@ -39,7 +39,7 @@ install node and npm: https://nodejs.org/en/download/
    `npm start`
 6. Visit the website to check the front-end is loaded: [http://localhost:3000/](http://localhost:3000/).
 
-In case you get the _"getaddrinfo ENOTFOUND localhost"_ error, visit [http://127.0.0.1:3000/](http://localhost:3000) instead or take a look at [this issue](https://github.com/angular/angular-cli/issues/2227#issuecomment-358036526).
+In case you get the _"getaddrinfo ENOTFOUND localhost"_ error, visit [http://127.0.0.1:3000/](http://127.0.0.1:3000) instead or take a look at [this issue](https://github.com/angular/angular-cli/issues/2227#issuecomment-358036526).
 
 You may also want to install
 [ImageMagick](https://www.imagemagick.org/script/download.php).