Playground Communication: timeout

[martinpucala]

What needs to be fixed?

Requests to play.rust-lang.org are timing out/failing.

Page(s) Affected

All examples in all sections on https://doc.rust-lang.org/stable/rust-by-example/ that can be run and show results.

Suggested Improvement

Make the server run again.

[senekor]

moved to the playground repo: rust-lang/rust-playground#1109