app.js

config.init(CONFIG_FILE)
  .then(() => {
    config.config.bodyParser = require('./config/upload_config');
    return hydraExpress.init(config.getObject(), version, onRegisterRoutes, onRegisterMiddleware);
  })

upload_config.js

MAX_FILE_SIZE = '20mb';

module.exports = {
  json: {
    limit: MAX_FILE_SIZE
  },
  urlencoded: {
    limit: MAX_FILE_SIZE,
    extended: false
  }
};