do gzip product detail page images

@@ -443,6 +443,7 @@ class DetailModel
                             '</p>' => '',
                             '<img src=' => "<img class=\"lazy\" src=\"data:image/gif;base64,R0lGODlhAQABAJEAAAAAAP///93d3f///yH5BAEAAAMALAAAAAABAAEAAAICVAEAOw==\" data-original=",
                             '<img border="0" src=' => "<img border=\"0\" class=\"lazy\" src=\"data:image/gif;base64,R0lGODlhAQABAJEAAAAAAP///93d3f///yH5BAEAAAMALAAAAAABAAEAAAICVAEAOw==\" data-original=",
+                            '.jpg' => '.jpg?imageMogr2/thumbnail/750x/quality/90',
                         )),
                     );
                 }