@pkinsky, thanks for your PR! By analyzing the history of the files in this pull request, we identified @Profpatsch, @lethalman and @abbradar to be potential reviewers.

I've been bitten by this, so I'll appreciate a comment about this basic issue in the manual. Thanks!

But I'd recommend going the other way around and do a recommendation based on the features these packages provide, and not on possible errors. For example, something like this:

If this container is expected to do any network interaction, it's likely that cacert and iana_etc will need to be mentioned here, as they provide CA certificates and the list of known network protocols often needed for this.

@k0001 good point. I was putting the note at the end of the section because the problem will probably only occur when the docker container is built from scratch (with no base image to provide basic networking utils).

Merging because it is better than what we've got. I'd love a PR improving it.

Merged in b14dd0e.