feat(server): add forgejo module

modules/nixos/server/web-apps/forgejo/default.nix

@@ -0,0 +1,30 @@
+{ config, lib, ... }:
+let
+  inherit (lib) mkEnableOption mkIf singleton;
+  inherit (lib.pantheon) mkRootDomain mkStrOption mkPortOption;
+  cfg = config.server.web-apps.forgejo;
+  upstreamCfg = config.services.forgejo;
+in
+{
+  options.server.web-apps.forgejo = {
+    enable = mkEnableOption "";
+    url = mkStrOption;
+    port = mkPortOption 3000;
+  };
+
+  config = mkIf cfg.enable {
+    persistDirs = singleton {
+      directory = upstreamCfg.stateDir;
+      inherit (upstreamCfg) user group;
+    };
+    server.networking.ddns.domains = singleton (mkRootDomain cfg.url);
+    server.web-servers.nginx.proxies = mkIf config.server.web-servers.nginx.enable (singleton {
+      source = cfg.url;
+      target = "http://${config.system.hostname}:${builtins.toString cfg.port}";
+    });
+    services.forgejo = {
+      enable = true;
+      settings.server.HTTP_PORT = cfg.port;
+    };
+  };
+}