1. Make sure Temporal Server is running locally (see the quick install guide).
2. npm install to install dependencies.
3. npm run start.watch to start the Worker.
4. In another shell, npm run start-workflow to run the Workflow Client
5. Run npm run query-workflow to query exchange rates for a given day (today by default)

The Workflow should print out exchange rates for several currencies:

{
  AED: 3.673005,
  AFN: 86,
  ALL: 114.75,
  AMD: 460.236151,
  ANG: 1.802194,
  ...
}