ahh, thanks. yeah it's really simple and i was going around places. 
One last query, during last step, i get below error. Where all should i rename containers es01/02/03/kib01 so it recreate the containers? I want to retain the data and all other stuff, just upgrade to 7.17.
"Status: Downloaded newer image for docker.elastic.co/kibana/kibana:7.17.6
Creating es03 ... error
Creating es01 ...
Creating kib01 ...
Creating es02 ...
Creating es02 ... error
ner to be able to reuse that name.
ERROR: for es02 Cannot create container for service es02: Conflict. The container name "/es02" is already in use by container "". You have to remove (or rename) that contaiCreating kib01 ... error
Creating es01 ... error
ERROR: for kib01 Cannot create container for service kibana: Conflict. The container name "/kib01" is already in use by container "". You have to remove (or rename) that container to be able to reuse that name.
ERROR: for es01 Cannot create container for service es01: Conflict. The container name "/es01" is already in use by container "". You have to remove (or rename) that container to be able to reuse that name.
ERROR: for es03 Cannot create container for service es03: Conflict. The container name "/es03" is already in use by container "". You have to remove (or rename) that container to be able to reuse that name.