hosts/library: extract grafana config

hosts/library/default.nix

@@ -3,6 +3,7 @@
 {
   imports = [
     ./hardware-configuration.nix
+    ./grafana.nix
     ../server.nix
   ];
 
@@ -46,17 +47,6 @@
     enable = true;
   };
 
-  services.grafana = {
-    enable = true;
-    settings = {
-      server = {
-        domain = "library.mesh.vimium.net";
-        http_addr = "0.0.0.0";
-        http_port = 3000;
-      };
-    };
-  };
-
   services.prometheus = {
     enable = true;
     port = 9001;

hosts/library/grafana.nix

@@ -0,0 +1,16 @@
+{
+  ...
+}:
+
+{
+  services.grafana = {
+    enable = true;
+    settings = {
+      server = {
+        domain = "library.mesh.vimium.net";
+        http_addr = "0.0.0.0";
+        http_port = 3000;
+      };
+    };
+  };
+}