add radish configuration

freun.dev/invidious.nix

@@ -0,0 +1,25 @@
+{ ... }:
+let
+  fqdn = "vid.freun.dev";
+in
+{
+  services.invidious = {
+    enable = true;
+    domain = fqdn;
+
+    settings = {
+      external_port = 443;
+      db = {
+        dbname = "invidious";
+        user = "invidious";
+      };
+    };
+  };
+
+  services.caddy.virtualHosts = {
+    "${fqdn}".extraConfig = ''
+      reverse_proxy localhost:3000
+    '';
+  };
+
+}