made nix_builders not ephemeral and depended on gitea

systems/jeeves/runners/nix_builder.nix

@@ -51,7 +51,6 @@ in
         autoStart = true;
         privateNetwork = true;
         hostBridge = cfg.bridgeName;
-        ephemeral = true;
         bindMounts = {
           host-nix = {
             mountPoint = "/host-nix/var/nix/daemon-socket";
@@ -143,5 +142,15 @@ in
           };
       }
     ) cfg.containers;
+
+    systemd.services = builtins.listToAttrs (
+      map (name: {
+        name = "container@${name}";
+        value = {
+          requires = [ "gitea.service" ];
+          after = [ "gitea.service" ];
+        };
+      }) (builtins.attrNames (filterAttrs (_: c: c.enable) cfg.containers))
+    );
   };
 }