Fix firewall config to accept HTTP connections

At the moment, connections to `http://google.codecity.world`, `http://google.codecity.academy` and `http://google.codecity.games` redirect to `https://google.codecity.games`, but `https://google.codecity.academy` and `https://google.codecity.games` do not. (That is: redirects from HTTP -> HTTPS canonicalise, but no redirect or canonicalisation is done for already-HTTPS connections.)

All connections should redirect to HTTPS to the server's canonical name.