Yes, actually we’ve been discussing about when we release docker changes at Process and rules to release changes for the official XWiki Docker images and we decided that it’s better that it is in sync with the XWiki releases.
Yesterday we’ve released 18.6.0 (the release was a few days ago but the docker distribution had an issue that we fixed yesterday), 18.4.3 and then 17.10.11 in the evening. Right now the docker images are released or 18.6.0 an 18.4.3 but in progres for 17.10.11 ( see https://dev.xwiki.org/xwiki/bin/view/ReleasePlans/ReleasePlan17.10.11 ). It should land tonight I think.