Using this module to access your configuration values you can edit your configuration inside the E2E Bridge (see Node.js Service Settings). At each deployment for development, testing or production you can change the configuration to match the environment and your needs. Technically it is a wrapper to nconf.
To use e2e-conf in your current project and add it as dependency to your package.json run:
npm install --save e2e-conf
You can find more a more detailed documentation of the package on the GitHub or NPM pages.