Use sops for private key distribution

nixos/modules/borgbackup.nix

@@ -132,10 +132,23 @@ in {
       };
     };
     environment.persistence.${config.impermanence.name} = {
-      users.fsaccount.directories = [
+      /*
+          users.fsaccount.directories = [
+          {
+            directory = ".ssh"; # SSH Key with access to FS Account and known_hosts
+            mode = "u=rwx,g=,o=";
+          }
+        ];
+      };
+      */
+      users.fsaccount.files = [
         {
-          directory = ".ssh"; # SSH Key with access to FS Account and known_hosts
-          mode = "u=rwx,g=,o=";
+          file = ".ssh/known_hosts";
+          parentDirectory = {
+            mode = "u=rwx,g=,o=";
+            user = "fsaccount";
+            group = "users";
+          };
         }
       ];
     };