Add goaccess dashboard module

configuration.nix

@@ -2,6 +2,7 @@
   imports = [
     ./hardware-configuration.nix
     ./networking.nix # generated at runtime by nixos-infect
+    ./goaccess.nix
   ];
 
   nix = {
@@ -27,6 +28,17 @@
     "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIAoyFSuik6XRU2b+O4v9C1bc7rKJyjKgzUeaBaVNQKN6 vanilla-pinebook"
   ];
 
+  users.groups.www = {};
+  services.nginx.group = "www";
+
+  services.goaccess = {
+    enable = true;
+    user = "goaccess";
+    group = "www";
+    dir = "/var/www/goaccess";
+    host = "dash.danilafe.com";
+  };
+
   services.danilafe-blog = {
     enable = true;
     challengePath = "/var/www/challenges";