How To set proxy in windows for CLI

I am learning ionic and as a starter I have to download project from github through CLI. Also I am behind proxy server and using windows. So the steps are like this

1. I have to open command prompt set proxy first

set HTTP_PROXY= http://myproxy:8080

and then

ionic start myApp(which then begins download from github)

So my question is, is their any way that this proxy setting can be done permanently just once because now I have to set proxy every time I start commmand prompt.