监听F5刷新，添加路由前缀

为了解决ninx反向代理，添加路由，但最终react的route还是不认识，研究了半天做个记录：

document.addEventListener("keydown",function(event){

          if (event.code === 'F5') {

            event.preventDefault();

            console.info(event.code, event);

            var pathname = location.pathname;

            var newUrl = null;

            if (pathname.indexOf('/sfgl') < 0) {

              newUrl = location.origin + '/sfgl' + pathname;

              console.log(newUrl);

              window.location.assign(newUrl);

            }

          }

        })