caveman: enable smokestack, set ram to 8gb

hosts/caveman/default.nix

@@ -9,13 +9,13 @@
     mounts = [ "etc" "var"];
   };
   microvm = {
-    vcpu = 16;
-    mem = 16 * 1024;
+    vcpu = 8;
+    mem = 8 * 1024;
   };
 
   networking = {
     hostName = "caveman";
-    firewall.allowedTCPPorts = [ 80 443 ];
+    firewall.allowedTCPPorts = [ 23 80 443 ];
   };
 
   services.journald.extraConfig = ''
@@ -38,6 +38,7 @@
       };
     };
     gatherer.enable = true;
+    smokestack.enable = true;
   };
 
   services = {