- set default to 28
- remove minor version from matrix; docker:dind images also provide a
"docker:28-dind" which point to the latest minor version.
- remove TODO for 19.03, which is really out of scope now.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
... in preference to `chsh`, since in recent alpine 3.9.2 images that can fail
with:
Password: chsh: PAM: Authentication token manipulation error
Which seems to relate to the use of `!` as the password for `root` in `/etc/shadow`gq
Signed-off-by: Ian Campbell <ijc@docker.com>
