ecosystem.config.js

'use strict';

const path = require('path');

const cwd = path.resolve(__dirname);

const ecosystem_config = {
    apps: [
        {
            name: 'foo app',
            script: 'npm run --silent start',
            cwd,
        },
    ]
};

module.exports = ecosystem_config;

package.json

{
  "start": "NODE_ENV=production $NVM_DIR/versions/node/v$(cat .nvmrc)/bin/node entry.js"
}