node start with environment variables
#Bash
NODE_ENV=production && OTHER_ENV=foo && node ./index.js
#or if you have your npm scripts set
NODE_ENV=production && OTHER_ENV=foo && npm start
#Powershell
$env:NODE_ENV="production"; $env:OTHER_ENV="foo"; node .\index.js
#or if you have your npm scripts set
$env:NODE_ENV="production"; $env:OTHER_ENV="foo"; npm run build
#CMD
set NODE_ENV=production && set OTHER_ENV=foo && node .\index.js
#or if you have your npm scripts set
set NODE_ENV=production && set OTHER_ENV=foo && npm run build