epyc: add hydra.newtype.fr

modules/hydra/coordinator.nix

@@ -0,0 +1,9 @@
+{ ... }: {
+  services.hydra = {
+    enable = true;
+    hydraURL = "https://hydra.newtype.fr";
+    notificationSender = "hydra@localhost";
+    buildMachinesFiles = [ ];
+    useSubstitutes = true;
+  };
+}