The official smashwilson/lets-nginx repo does not have tags. In order to make sure there's no silent update between pulls, we're pushing tags of smashwilson/lets-nginx here.
There are two tags pointing to the same image, one a date (YYYY-MM-DD) and one a version number (x.y). The image age should make it obvious which below together. (There's no date tag for 1.1 and 1.2 unfortunately.)