♻️ refactor some monitoring configs

modules/base/nixos.nix

@@ -1,6 +1,6 @@
 { config, ... }: {
 
-  imports = [ ./common.nix ];
+  imports = [ ./common.nix ../monitoring ];
 
   nix = {
     gc = {
@@ -20,6 +20,11 @@
     mosh.enable = true;
   };
 
+  services = {
+    openssh.enable = true;
+    tailscale.enable = true;
+  };
+
   system = {
     autoUpgrade = {
       enable = true;

modules/monitoring/default.nix

@@ -0,0 +1,17 @@
+_:
+
+{
+  services = {
+    prometheus = {
+      enable = true;
+      port = 9090;
+      exporters = {
+        node = {
+          enable = true;
+          enabledCollectors = [ "systemd" ];
+          port = 9100;
+        };
+      };
+    };
+  };
+}