When an image pull fails but the service has a `build` section, it
will be built, so it's not an unrecoverable error. It's now logged as
a warning - in situations where the image will _never_ exist in a
registry, `pull_policy: never` can & should be used, which will
prevent the error and avoid unnecessary pull attempts.
Signed-off-by: Risky Feryansyah Pribadi <riskypribadi24@gmail.com>
Nicolas De loof
Guillaume Lours
Risky Feryansyah
Matthias Dötsch