ecosystem.config.js

/**
 * PM2 Configuration https://pm2.keymetrics.io/docs/usage/application-declaration/
 * Only one instances of worker and server are run because of heroku's memory limitation problem
 * for hobby plans
 */
module.exports = {
  apps: [
    {
      name: 'server',
      script: 'server.js',
      instances: 1,
      exec_mode: 'cluster',
      autorestart: true,
      watch: false,
      max_memory_restart: '1G',
      env: {
        NODE_ENV: 'development',
      },
      env_production: {
        NODE_ENV: 'production',
      },
    },
    {
      name: 'worker',
      script: 'worker.js',
      instances: 1,
      autorestart: true,
      watch: false,
      max_memory_restart: '1G',
      env: {
        NODE_ENV: 'development',
      },
      env_production: {
        NODE_ENV: 'production',
      },
      env_staging: {
        NODE_ENV: 'staging',
      },
    },
  ],

  deploy: {
    production: {
      user: 'node',
      host: '212.83.163.1',
      ref: 'origin/master',
      repo: 'git@github.com:repo.git',
      path: '/var/www/production',
      'post-deploy':
        'npm install && pm2 reload ecosystem.config.js --env production',
    },
  },
};