Add Forgejo service and auto-upgrade configuration

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

flake.lock

@@ -27,11 +27,11 @@
         "treefmt-nix": "treefmt-nix"
       },
       "locked": {
-        "lastModified": 1771196666,
-        "narHash": "sha256-mEdhnyzuW2fTP/dBpJE6EnvTH2fbQXOOwZgjJ1trQmU=",
+        "lastModified": 1771212716,
+        "narHash": "sha256-7oQXqJPzn7ANxr5CmD9ygKAqNXnQNy715OwP7Vjza34=",
         "ref": "refs/heads/main",
-        "rev": "55ccfdb9733347f1985206e782d6fd89e46c15c3",
-        "revCount": 6089,
+        "rev": "77928a62b4fb8a23a50294128da0dc5e1abb15f4",
+        "revCount": 6103,
         "type": "git",
         "url": "https://forgejo.ellis.link/continuwuation/continuwuity"
       },

hosts/homeserver/configuration.nix

@@ -66,5 +66,7 @@
     sops
   ];
 
+  system.autoUpgrade.flake = "git+https://forgejo.ellie.town/wizzy/home-server#home-server";
+
   system.stateVersion = "25.05";
 }

hosts/vps/configuration.nix

@@ -3,5 +3,7 @@
 {
   boot.loader.grub.enable = true;
 
+  system.autoUpgrade.flake = "git+https://forgejo.ellie.town/wizzy/home-server#vps";
+
   sops.age.keyFile = "/var/lib/sops-nix/key.txt";
 }