Q:

Grails - localhost:8080 refused to connect

I am trying to run my first Grails app and I am getting a error when I try to go to localhost:8080.  It just refuses to connect. 
I followed Dan Vega's instructions in his video https://www.youtube.com/watch?v=PlMyRGIJNa0 carefully but I cannot get my app to run. 
I have tried to change the host but couldn't get to the right place to do so.  Any help would be much appreciated. 

A:

You can change you server port.  You need to add in application.yml as follow to run
server:
    port: 8181   

