Add extra systemd config to server profile

hosts/server.nix

@@ -7,6 +7,8 @@
 
   documentation.enable = false;
 
+  fonts.fontconfig.enable = false;
+
   security = {
     acme.acceptTerms = true;
     auditd.enable = true;
@@ -18,6 +20,20 @@
     };
   };
 
+  systemd = {
+    enableEmergencyMode = false;
+
+    sleep.extraConfig = ''
+      AllowSuspend=no
+      AllowHibernation=no
+    '';
+
+    watchdog = {
+      runtimeTime = "20s";
+      rebootTime = "30s";
+    };
+  };
+
   modules.networking.tailscale = {
     enable = true;
     restrictSSH = false;