Create test runner

[lpil]

Hello!

Thank you for making such a wonderful template repository. It was very easy to create a Gleam test runner using it as a base.

Closes exercism/gleam#28

[ErikSchierboom]

LGTM! One thing I did find is that running the tests seemed to be relatively slow, and I have a beefy machine. We'll need to see if there are timeouts once we have this deployed.

Thank you for making such a wonderful template repository. It was very easy to create a Gleam test runner using it as a base.

Thanks! This is lovely to hear.

Note that for the test runner to be deployed, @iHiD needs to merge exercism/terraform#82 and then run terraform (as well as giving proper access to the right secrets).

[chouzar]

Tried to do some tests but I'm likely missing something.

[lpil]

LGTM! One thing I did find is that running the tests seemed to be relatively slow, and I have a beefy machine. We'll need to see if there are timeouts once we have this deployed.

@ErikSchierboom That's interesting- how long did they take to run for you? It takes 2 seconds to run an exercise for me on my laptop, though that is outside of docker.

[lpil]

I've attempted to improve performance by precompiling the deps. I could possibly optimise it further by using the JavaScript backend, but seeing as there's lots of tracks that compile a lot slower than Erlang (and a literal Erlang track!) that shouldn't be required. Perhaps there is some other problem?

[ErikSchierboom]

@ErikSchierboom That's interesting- how long did they take to run for you? It takes 2 seconds to run an exercise for me on my laptop, though that is outside of docker.

I found they took about 8-9 seconds, and that was using Docker. We've occasionally had tracks that were very slow in our Docker environment. But let's wait and see what things look like on our production servers.

[lpil]

OK, thank you!