Checking if update is available and updating on demand

[GelaniNijraj]

The HTTP API mode is almost what I need. Currently, when this mode is enabled and I make and API call to the update endpoint, it pulls the latest image and updates the container.

I was wondering if there was any way to just check if update is available and then, if required, update the container. May be 2 different API endpoints - one which checks for updates, and another which updates the container. This would be helpful in giving the control to end user from UI.

I know there are no such endpoints available currently but is there any other way to achieve this?