I have created an AdonisJS application from scratch, no custom code at the moment. I compile it and then try to serve it with pm2, but when I do pm2 logs web-app I get the following error:

Missing environment variable "DB_DATABASE"

I tried to add it to my ecosystem.config.cjs file like that:

module.exports = {
  apps : [{
    name: 'web-app',
    script: 'build/bin/server.js',
    instances: 2,
    exec_mode: 'cluster',
    autorestart: true,
    env: {
      DB_DATABASE: 'my_database_name',
      
    }
  }]
};

and it actually removes this error (now I get Missing environment variable "DB_USER", but I guess it means I need to copy all environment variables).

It doesn’t comply with avoid duplicated code practice, even worse it means I define same variable in two places.

Is there any other way to solve this error?