add radicle-explorer module, and enable it on Cape

nixos/configurations/Cape/default.nix

@@ -28,6 +28,7 @@
       caddy = {
         enable = true;
         baseDomain = "youthlic.fun";
+        radicle-explorer.enable = true;
       };
       juicity.server.enable = true;
     };

nixos/modules/programs/caddy/default.nix

@@ -5,6 +5,9 @@
 }: let
   cfg = config.youthlic.programs.caddy;
 in {
+  imports = [
+    ./radicle-explorer.nix
+  ];
   options = {
     youthlic.programs.caddy = {
       enable = lib.mkEnableOption "caddy";

nixos/modules/programs/caddy/radicle-explorer.nix

@@ -0,0 +1,27 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}: let
+  cfg = config.youthlic.programs.caddy.radicle-explorer;
+  caddy-cfg = config.youthlic.programs.caddy;
+in {
+  options = {
+    youthlic.programs.caddy.radicle-explorer = {
+      enable = lib.mkEnableOption "caddy.radicle-explorer";
+    };
+  };
+  config = lib.mkIf (cfg.enable && caddy-cfg.enable) {
+    services.caddy.virtualHosts = {
+      "radicle.${caddy-cfg.baseDomain}" = {
+        extraConfig = ''
+          root * ${pkgs.radicle-explorer}
+          encode zstd gzip
+          try_files {path} /index.html
+          file_server
+        '';
+      };
+    };
+  };
+}

nixos/modules/programs/default.nix

@@ -7,7 +7,7 @@
     ./transfer-sh.nix
     ./rustypaste
     ./mautrix-telegram.nix
-    ./caddy.nix
+    ./caddy
     ./dae
     ./forgejo.nix
     ./kanata.nix