flake.nix: add host riv-01

flake.nix

@@ -349,6 +349,33 @@
           ];
         };
 
+        riv-01 = lib.nixosSystem {
+          specialArgs = {
+            inherit inputs pkgsUnstable;
+            hostname = "riv-01";
+            stateversion = "25.05";
+          };
+          modules = [
+            ./configuration.nix
+            inputs.comin.nixosModules.comin
+            (
+              { ... }:
+              {
+                services.comin = {
+                  enable = true;
+                  remotes = [
+                    {
+                      name = "origin";
+                      url = "https://git.its-et.me/etorres/nixos.git";
+                      branches.main.name = "main";
+                    }
+                  ];
+                };
+              }
+            )
+          ];
+        };
+
         test-nixos = lib.nixosSystem {
           specialArgs = {
             inherit inputs pkgsUnstable;