pm2.production.js

let ENVOIRMENT = require('./env.production.js'),
    GREEN_ENV = Object.assign({
        SSR_PORT: 8080,
    }, ENVOIRMENT),
    BLUE_ENV = Object.assign({
        SSR_PORT: 9090,
    }, ENVOIRMENT);

    console.log('GREEN ENV', GREEN_ENV);
    console.log('BLUE ENV', BLUE_ENV);

module.exports = {
    APPS: [
        {
            name: 'SSR_GREEN',
            script: 'src/server.js',
            instances: 2,
            exec_mode: 'cluster',
            autorestart: true,
            watch: false,
            max_memory_restart: '2G',
            kill_timeout: 10000,
            env_production: GREEN_ENV,
        },
        {
            name: 'SSR_BLUE',
            script: 'src/server.js',
            instances: 2,
            exec_mode: 'cluster',
            autorestart: true,
            watch: false,
            max_memory_restart: '2G',
            kill_timeout: 10000,
            env_production: BLUE_ENV,
        },
    ],
};