Scrape web01 node_exporter into VictoriaMetrics

Add web01 to the mesh map and the node scrape job so it appears on the
uptime/host dashboards alongside the other hosts.

modules/mesh-hosts.nix

@@ -13,7 +13,13 @@ let
   readVar =
     machine: file: builtins.readFile "${dir}/vars/per-machine/${machine}/zerotier/${file}/value";
 
-  hosts = lib.genAttrs [ "control" "ns1" "ns2" "mx1" ] (m: readVar m "zerotier-ip");
+  hosts = lib.genAttrs [
+    "control"
+    "ns1"
+    "ns2"
+    "mx1"
+    "web01"
+  ] (m: readVar m "zerotier-ip");
 
   # RFC 4193 prefix of this ZeroTier network: fd + the 8-byte network id + the
   # 0x9993 marker. The network id is a public var on the controller (control).

modules/monitoring/server.nix

@@ -46,6 +46,7 @@ in
             (target "ns1" (v6 mesh.hosts.ns1) 9100)
             (target "ns2" (v6 mesh.hosts.ns2) 9100)
             (target "mx1" (v6 mesh.hosts.mx1) 9100)
+            (target "web01" (v6 mesh.hosts.web01) 9100)
           ];
         }
         {