infra(epyc): add my key on builder and iperf3 server

modules/builder.nix

@@ -4,6 +4,7 @@
     home = "/home/nix";
     openssh.authorizedKeys.keys = [
       "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIAZpEtSfB0GDwcELc5/AKNiBZJV9OVfQ0BMFzBlF+8Yd raito@everywhere"
+      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIA3hCOyFwuoCLt5W9e9yQSwj9I+VspB0kNNHsoFngbgZ raito@thors"
     ];
     uid = 5001;
   };

modules/iperf-server.nix

@@ -0,0 +1,6 @@
+{ ... }: {
+  services.iperf3 = {
+    enable = true;
+    openFirewall = true;
+  };
+}