Use sops for private key distribution

nixos/modules/borgbackup.nix

@@ -132,6 +132,7 @@ in {
       };
     };
     environment.persistence.${config.impermanence.name} = {
+      /*
           users.fsaccount.directories = [
           {
             directory = ".ssh"; # SSH Key with access to FS Account and known_hosts
@@ -139,6 +140,18 @@ in {
           }
         ];
       };
+      */
+      users.fsaccount.files = [
+        {
+          file = ".ssh/known_hosts";
+          parentDirectory = {
+            mode = "u=rwx,g=,o=";
+            user = "fsaccount";
+            group = "users";
+          };
+        }
+      ];
+    };
     sops.secrets.backupKey = {
       sopsFile = ../machines/bragi/backupKey.yaml;
       owner = config.users.users.fsaccount.name;