set env variable windows code example

Example 1: how to create env variable from cmd

set varname
set varname=value
set varname=
set

Example 2: set environment variable windows command line

setx EC2_CERT "%USERPROFILE%\aws\cert.pem"

Example 3: how to set up env variable

npm install dotenv --save

Next add the following line to your app: "require('dotenv').config()"

Then create a .env file at the root directory of your application 
and add the variables to it.