Change path for Ubuntu docker GPG key

[dogsbody]

Is this a docs issue?

• My issue is about the documentation content or website

Type of issue

Information is incorrect

Description

I suggest changing instances of /etc/apt/keyrings/docker.gpg to /usr/share/keyrings/docker.gpg

The reasons:

1. The instructions were asking us to create /etc/apt/keyrings while /usr/share/keyrings already exists for exactly this use.
2. The old path is very close to /etc/apt/trusted.gpg.d/ which should never be used. Any gpg keys placed in /etc/apt/trusted.gpg.d will be trusted blindly by all repositories on the system.

In short, in the last few years, /usr/share/keyrings has now been defined as the place to put these new repository specific gpg keys 👍

Location

https://docs.docker.com/engine/install/ubuntu/

Suggestion

No response

[dvdksn]

The keyrings directory won't be changed, details here: #17686 (comment)

[docker-robot]

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