fix(sourcehut): try and make it use http for internal communication

None of my previous changes could have worked, because nginx
automatically redirects http to https. I think this is the setting I
need to change so that pure http works as well.

nixos/configuration.nix

@@ -304,7 +304,7 @@ in
 
   services.nginx = {
     enable = true;
-    recommendedTlsSettings = true;
+    recommendedTlsSettings = false;
     recommendedOptimisation = true;
     recommendedGzipSettings = true;
     recommendedProxySettings = true;