To update a container to the latest up-to-date version, click Check for Updates on Container page to search for updates for your docker image:
If updates are available, then Check for Updates button will change for Update:
Click Update and confirm your action by clicking OK. Note that during update the whole pod will be restarted:
You can also update container on Pod page. Click update icon to check if any updates are available:
If updates are available, then update icon will change for download icon:
Click on update icon and then OK to confirm your action.