Guide needed to set environment variables in ionicv3

I will refer to the link below:

I am confused with
$ export HTTP_PROXY=“” # also used by npm
$ export HTTPS_PROXY=“” # also used by npm

where do i configure the parameters to? I do not see an environment file to add the config…

In the configuration files for your shell. I use zsh, so for me that would be ~/.zshenv. See the documentation for whatever shell you use for more information.