message: Clarify how to run Cypress tests locally
diff: @@ -18,6 +18,17 @@ yarn install
  yarn cypress run
  ```
  +Note that the tests expect to run against a built application, so you'll want to
  +run a Docker image and either create an `app-config.cypress.yaml` or pass the
  +necessary environment variables:
  +
  +```sh
  +yarn tsc
  +yarn build
  +yarn workspace example-backend build-image
  +docker run -p 7007:7007 example-backend
  +```
  +
  You can open up the `cypress` console by using `yarn cypress open`.
  You can also run towards any Backstage installation by using the Cypress Environment Variable overrides.
  