Bunch of improvements

Make tickTime, initLimit and syncLimit configurable via environment variables
Reduced the number of layers in the Dockerfile
Updated documentation

library/zookeeper

@@ -2,9 +2,9 @@ Maintainers: Elisey Zanko <[email protected]> (@31z4)
 GitRepo: https://github.com/31z4/zookeeper-docker.git
 
 Tags: 3.3.6, 3.3
-GitCommit: f0b1f9f7c6fec5a98563a20d79bdcec5f263fd6a
+GitCommit: d39ed030b400db97296bbb411d25a5f7f472b7bc
 Directory: 3.3.6
 
 Tags: 3.4.9, 3.4, latest
-GitCommit: f0b1f9f7c6fec5a98563a20d79bdcec5f263fd6a
+GitCommit: d39ed030b400db97296bbb411d25a5f7f472b7bc
 Directory: 3.4.9