old_contents: module.exports = {
      db: {
          qrest_api:{
              $filter: 'env',
              $base: {
                  options: {}
              },
              production: {
                  url: 'mongodb://mongodb:27017/qrest_api'
              },
              $default: {
                  url: 'mongodb://localhost:27017/qrest_api'
              }
          },
          default_db: 'qrest_api'
      }
  
  };
  
  
new_contents: module.exports = {
      db: {
          qrest_api:{
              $filter: 'env',
              $base: {
                  options: {}
              },
              production: {
                  url: process.env.MONGODB_URL || 'mongodb://mongodb:27017/qrest_api'
              },
              $default: {
                  url: process.env.MONGODB_URL || 'mongodb://localhost:27017/qrest_api'
              }
          },
          default_db: 'qrest_api'
      }
  
  };
  
  
subject: Add env override for mongodb url