Error: Precise coverage has not been started.

Hi Gleb,

I tried the repo locally - installed the deps with `npm i`, added the base URL to `cypress.json`

```
{
"baseUrl": "http://localhost:5000"
}
```

and started the app with `npx serve`. I do see "hello world" when I navigate to `http://localhost:5000` with a regular browser, but I get the error "Precise coverage has not been started." in the Cypress test...

Would love to push this forward with what I can, as setting up two frontend builds (the instrumented build to run Cypress tests against and the prod build without instrumentation) is a bit of a hassle.