rename nodes and add runner for gitea instance

hosts/sin/coredns/db.homelab.local

@@ -0,0 +1,6 @@
+$ORIGIN homelab.local.
+@         IN  SOA dns.homelab.local. shobu_serhao.proton.me. 2502011720 7200 3600 1209600 3600
+
+dns       IN  A   10.0.0.5
+thea      IN  A   10.0.0.5
+sin       IN  A   10.0.0.4

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
+      }
+    '';
+  };
+}