先拉取镜像
docker pull
docker.elastic.co/elasticsearch/elasticsearch:6.7.1

然后创建容器 (这是一条长的命令!!!)
docker run -e ES_JAVA_OPTS="-Xms256m -Xmx256m" -d -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node"
docker.elastic.co/elasticsearch/elasticsearch:6.7.1
