a webapp to download error-rates from TrackJS and serve them as Prometheus metrics

You'll need to provide your CUSTOMER_ID and AUTHORIZATION either as environment variables, or in a .env file.

Example .env file:

CUSTOMER_ID=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
AUTHORIZATION=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

then add any applications you want to proxy to the array in applications.js.

You can start a development environment with npm run dev.

You can start an instance without and debug logging with npm start.