Backup: Use single repo + host key per deployment

morph/grid/local/private-keys/borgbackup/storage2.passphrase

-storage1.passphrase
\ No newline at end of file

morph/grid/local/private-keys/borgbackup/storage2.ssh-key

-storage1.ssh-key
\ No newline at end of file

morph/lib/borgbackup.nix

@@ -33,12 +33,12 @@ in {
           # The passphrase is used to encrypt the repo key
           # https://borgbackup.readthedocs.io/en/stable/usage/init.html
           destination = "/run/keys/borgbackup/passphrase";
-          source = "${privateKeyPath}/borgbackup/${config.networking.hostName}.passphrase";
+          source = "${privateKeyPath}/borgbackup.passphrase";
         };
         "borgbackup-appendonly-ssh-key" = {
           # The ssh key is used to authenticate to the remote repo server
           destination = "/run/keys/borgbackup/ssh-key";
-          source = "${privateKeyPath}/borgbackup/${config.networking.hostName}.ssh-key";
+          source = "${privateKeyPath}/borgbackup.ssh-key";
         };
       };
     };