fix: exec: zookeeper: not found (laradock#2199)

jk2K · bestlong · commit 01eb934863cc · 2019-07-14T11:44:52.000+08:00
refer to [Zookeeper latest 3.5.5 Dockerfile](https://github.com/31z4/zookeeper-docker/blob/c978f835bc33509324b51cb210c8c5c9934c38ff/3.5.5/Dockerfile)
diff --git a/zookeeper/Dockerfile b/zookeeper/Dockerfile
@@ -7,4 +7,4 @@ VOLUME /datalog
 
 EXPOSE 2181
 
-CMD ["zookeeper"]
+CMD ["zkServer.sh", "start-foreground"]

Original file line number	Diff line number	Diff line change
`@@ -7,4 +7,4 @@ VOLUME /datalog`
`7`	`7`
`8`	`8`	`EXPOSE 2181`
`9`	`9`
`10`		`-CMD ["zookeeper"]`
	`10`	`+CMD ["zkServer.sh", "start-foreground"]`