rename nodes and add runner for gitea instance

hosts/sin/coredns/default.nix

@@ -0,0 +1,20 @@
+{...}: {
+  services.coredns = {
+    enable = true;
+    config = ''
+      homelab.local {
+        log
+        errors
+        cache
+        file ${./db.homelab.local}
+      }
+      
+      . {
+        forward . 8.8.8.8
+        log
+        errors
+        cache
+      }
+    '';
+  };
+}