Update couchbase CE 6.6 to CE 7.0


Currently we’re using Couchbase Community Edition 6.6.0 and we would like to update to Community Edition 7.0.2 running on

Distributor ID: Ubuntu
Description: Ubuntu 18.04.5 LTS
Release: 18.04
Codename: bionic

Is there a clear documentation on how to update to latest CE? All I can find out is an upgrade from CE to EE. Please advise?