feat: general backup module for rsyncd

hosts/nihilus/default.nix

@@ -31,8 +31,8 @@
             mode = "write";
           }
           {
-            name = "brontes-backup";
+            name = "shan";
-            comment = "brontes's backup space";
+            comment = "backups for shan";
             mode = "write";
           }
           {

hosts/shan/default.nix

@@ -89,6 +89,21 @@
       rsync-backup = {
         enable = true;
         modules = [
+          {
+            sources = [
+              "/var/lib/paperless"
+              "/var/lib/radicale"
+              "/var/lib/navidrome"
+              "/var/lib/immich"
+              "/var/lib/freshrss"
+            ];
+            target = {
+              location = "shan";
+              type = "rsyncd";
+              host = "nihilus";
+            };
+            incremental.enable = true;
+          }
           {
             sources = [ "/var/lib/paperless" ];
             target = {
@@ -143,7 +158,6 @@
             };
             incremental.enable = true;
           }
-
         ];
       };
     };