我使用react路由器制作单页应用程序，我尝试用npm run build构建它，然后我将build文件夹上传到我的web服务器，但我的网站只显示背景。我想知道如何使它发挥作用。
2017-04-26T19：06：27.864737 + 00:00 app [web.1]：npm ERR！或者如果不是这样的话
可用，您可以通过以下方式获取信息：
2017-04-26T19：06：27.864910 + 00:00 app [web.1]：npm ERR！ npm所有者ls notes-
app-client
2017-04-26T19：06：27.865077 + 00:00 app [web.1]：npm ERR！上面可能还有其他日志记录输出。
2017-04-26T19：06：27.870949 + 00:00 app [web.1]：
2017-04-26T19：06：27.871279 + 00:00 app [web.1]：npm ERR！请包括
以下任何支持请求的文件：
2017-04-26T19：06：27.871450 + 00:00 app [web.1]：npm ERR！ /app/npm-debug.log
2017-04-26T19：06：27.993054 + 00:00 heroku [web.1]：状态从开始变为
坠毁2017-04-26T19：06：42.961236 + 00:00 heroku [router]：at = error code = H10
desc =“App
坠毁“method = GET path =”/“host = educationapp.herokuapp.com
request_id = 72015192-8122-4fba-beb0-69c8f1e38129 fwd =“49.228.99.168”dyno =
connect = service = status = 503 bytes = protocol = https
2017-04-26T19：06：43.534651 + 00:00 heroku [router]：at = error code = H10 desc =“App
坠毁“method = GET path =”/ favicon.ico“host = educationapp.herokuapp.com
request_id = 83684431-92be-4080-a2f8-7165e21f6c72 fwd =“49.228.99.168”dyno =
connect = service = status = 503 bytes = protocol = https
2017-04-26T19：14：57.478915 + 00:00 heroku [router]：at = error code = H10 desc =“App
坠毁“method = GET path =”/“host = educationapp.herokuapp.com
request_id = 022a219d-2299-4d23-b713-6bb75497f0e6 fwd =“49.228.99.168”dyno =
connect = service = status = 503 bytes = protocol = https
2017-04-26T19：14：57.922975 + 00:00 heroku [router]：at = error code = H10 desc =“App
坠毁“method = GET path =”/ favicon.ico“host = educationapp.herokuapp.com
request_id = ae9bf961-22a9-47f8-be5d-234d97f83ca3 fwd =“49.228.99.168”dyno =
connect = service = status = 503 bytes = protocol = https