Add gettext package to the Bitpoll environment for internationalization support

flake.nix

@@ -461,6 +461,10 @@
                 BITPOLL_SECRET_KEY_FILE = cfg.secretKeyFile;
               };
 
+              path = [
+                pkgs.gettext
+              ];
+
               preStart = ''
                 # Ensure data directory exists and has correct permissions
                 mkdir -p ${cfg.dataDir}/{static,media}