migrate-mongo-config.js

const config = {
  mongodb: {
    url: process.env.DB_URL,

    databaseName: process.env.DB_NAME,

    options: {
      useNewUrlParser: true, // removes a deprecation warning when connecting
      useUnifiedTopology: true, // removes a deprecating warning when connecting
    }
  },

  // The migrations dir, can be an relative or absolute path. Only edit this when really necessary.
  migrationsDir: "migrations",

  // The mongodb collection where the applied changes are stored. Only edit this when really necessary.
  changelogCollectionName: "changelog",

  // The file extension to create migrations and search for in migration dir 
  migrationFileExtension: ".js",

  // Enable the algorithm to create a checksum of the file contents and use that in the comparison to determine
  // if the file should be run.  Requires that scripts are coded to be run multiple times.
  useFileHash: false,

  // Don't change this, unless you know what you're doing
  moduleSystem: 'commonjs',
};

module.exports = config;