Add tumbler and thumbnail service

nixos-config/configuration.nix

@@ -143,6 +143,9 @@ in
   # Enable the OpenSSH daemon.
   services.openssh.enable = true;
 
+  # Enable thumbnailer service
+  services.tumbler.enable = true;
+
   # Open ports in the firewall.
   # networking.firewall.allowedTCPPorts = [ ... ];
   # networking.firewall.allowedUDPPorts = [ ... ];

nixos-config/system-packages.nix

@@ -14,6 +14,8 @@
     xdg-utils # xdg directories, open, etc
     sweet # gtk theme
     capitaine-cursors # cursor theme
+    tumbler # image files thumbnail generator (+ base requirement)
+    ffmpegthumbnailer # video files thumbnail generator
   ];
 
 }