Prefer a hostname as the key

The IP address is given as an argument

morph/grid/testing/grid.nix

@@ -13,13 +13,14 @@ import ../../lib/make-grid.nix {
     );
     sshUsers = importDef {} ../../../../PrivateStorageSecrets/staging-users.nix;
   in {
-    "payments.privatestorage-staging.com" = import ../../lib/issuer.nix ({
+    "payments" = import ../../lib/issuer.nix ({
+      publicIPv4 = "18.197.42.120";
       inherit sshUsers;
       hardware = ../../lib/issuer-aws.nix;
       stateVersion = "19.03";
     } // cfg);
 
-    "3.120.26.190" = import ../../lib/make-testing.nix (cfg // {
+    "storage001" = import ../../lib/make-testing.nix (cfg // {
       publicIPv4 = "3.120.26.190";
       inherit sshUsers;
       hardware = ./testing001-hardware.nix;