feat(nixos): cut over Gitea to Pikachu

configs/nixos/guests/reverse-proxy.nix

@@ -1,10 +1,11 @@
 {
   config,
   lib,
+  registry,
   ...
 }:
 let
-  giteaSshBackend = "10.23.20.45:2022";
+  giteaAddress = registry.address.${config.networking.hostName}.gitea;
 in
 {
   config = lib.mkIf config.guests.reverse-proxy.enable {
@@ -16,7 +17,7 @@ in
           "git.alexion.dev" = {
             forceSSL = true;
             enableACME = true;
-            locations."/".proxyPass = "http://10.23.20.32";
+            locations."/".proxyPass = "http://${giteaAddress}:3000";
           };
           "photos.alexion.dev" = {
             forceSSL = true;
@@ -45,12 +46,12 @@ in
           };
         };
 
-        networking.firewall.allowedTCPPorts = [ 2022 ];
+        networking.firewall.allowedTCPPorts = [ 22 ];
 
         services.nginx.streamConfig = ''
           server {
-            listen 2022;
-            proxy_pass ${giteaSshBackend};
+            listen 22;
+            proxy_pass ${giteaAddress}:2222;
           }
         '';
       };