Example of a frogger app is not working

Where I click on the "here's" link in the README, I get this a billing error.
The link is "https://storage.googleapis.com/jane-street-ocaml-workshop-2018-03-24-frogger/index.html"

```

UserProjectAccountProblem
The project to be billed is associated with a closed billing account.
The billing account for the owning project is disabled in state closed

```

Check the README's "here's" link and the reported Google Cloud Storage URL first. Determine whether the example should be restored or the README reference replaced; done means the link no longer returns the billing error.

Written by the indexing model from the issue text.