[zineshop] remove upload limit for initial batch upload

this should later be set to something more reasonable

machines/vpn/configuration.nix

@@ -77,6 +77,7 @@ with lib;
           proxy_set_header X-Forwarded-Proto $scheme;
           proxy_set_header Authorization $http_authorization;  # Pass the Authorization header
           proxy_pass_header Authorization;
+          client_max_body_size 0;
         '';
       };
     };