16 Ensure CI execution of Niwot site

[Alomir]

Adds an existence check for the test output

[robkooper]

The action seemed to fail on windows, which seems to be most of the work adding this module.

[Alomir]

The action seemed to fail on windows, which seems to be most of the work adding this module.

Yep, apologies in being too fast on requesting a review - looking for cross-platform solution

[robkooper]

problem with the rm -f vs rm is that if the files does not exist it will fail with just the rm command. Seeing that it runs, I can only assume the file will exist.

[Alomir]

@robkooper Indeed, I'm not very excited by just rm - but at least in this case, all we want if the file to not exist when the test is run, so if it already doesn't, that's fine.

I'm hoping this is a stop-gap measure before we put a better regression test system in place.