impermanence: Persist caddy, gatus and tailscale state

modules/system/services/caddy.nix

@@ -96,6 +96,8 @@ in
               )
             );
         };
+
+        custom.persist.directories = [ "/var/lib/caddy" ];
       }
 
       (lib.mkIf tailscaleHostsExist {

modules/system/services/gatus.nix

@@ -165,5 +165,7 @@ in
           cfg.endpoints |> lib.attrValues |> lib.map (entry: mkEndpoint entry);
       };
     };
+
+    custom.persist.directories = [ "/var/lib/private/gatus" ];
   };
 }

modules/system/services/tailscale.nix

@@ -41,5 +41,7 @@ in
     };
 
     systemd.services.tailscaled-set.after = [ "tailscaled-autoconnect.service" ];
+
+    custom.persist.directories = [ "/var/lib/tailscale" ];
   };
 }