feat : Refractor my host specific to be more generic

module/forgejo.nix

@@ -0,0 +1,18 @@
+{ config,lib, ... }:
+
+lib.mkIf config.module.forgejo.enable {
+  services.forgejo = {
+    enable = true;
+    database.type = "postgres";
+    # Enable support for Git Large File Storage
+    lfs.enable = true;
+    settings = {
+      server = {
+        DOMAIN = "git.example.com";
+        # You need to specify this to remove the port from URLs in the web UI.
+        ROOT_URL = "https://${srv.DOMAIN}/";
+        HTTP_PORT = 3000;
+      };
+    };
+  };
+}