Deploy node js application with express framework on production mode

问题

How to deploy node js application with express framework with production environment variable with pm2 and generate startup script for reboot with same production environment variable.

I have used this so far

pm2 start hello.js
pm2 startup systemd 
sudo env PATH=$PATH:/usr/bin /usr/lib/node_modules/pm2/bin/pm2 startup 
systemd -u sammy --hp /home/sammy

It starts the application on reboot but in development mode

回答1:

To start a Node.js app in production mode, you'd need to set the NODE_ENV like so:

NODE_ENV=production # updates from 'development' to 'production'
pm2 start hello.js
pm2 startup systemd 
sudo env PATH=$PATH:/usr/bin /usr/lib/node_modules/pm2/bin/pm2 startup 
systemd -u sammy --hp /home/sammy

来源：https://stackoverflow.com/questions/45600952/deploy-node-js-application-with-express-framework-on-production-mode