es installation
https://www.cnblogs.com/jingping/p/9448099.html
https://blog.csdn.net/zhanyu1/article/details/88079626
elasticsearch start common errors
https://www.cnblogs.com/ zhi-leaf / p / 8484337.html
head (docker installation, Content settings)
https://blog.csdn.net/weixin_30613343/article/details/99501331