Packer - Lab 0, Task 1: "apt-key" is deprecated

[unix2038]

According to the "apt-key" man pages:

> apt-key - Deprecated APT key management utility
> 
> apt-key(8) will last be available in Debian 11 and Ubuntu 22.04.
> 
> DEPRECATION
>        Except for using apt-key del in maintainer scripts, the use of apt-key is deprecated. This section
>        shows how to replace existing use of apt-key.
> 
>        If your existing use of apt-key add looks like this:
> 
>        wget -qO- https://myrepo.example/myrepo.asc | sudo apt-key add -
> 
>        Then you can directly replace this with (though note the recommendation below):
> 
>        wget -qO- https://myrepo.example/myrepo.asc | sudo tee /etc/apt/trusted.gpg.d/myrepo.asc

[ ie: curl -fsSL https://apt.releases.hashicorp.com/gpg | sudo tee /etc/apt/trusted.gpg.d/hashicorp.asc ]

>        Make sure to use the "asc" extension for ASCII armored keys and the "gpg" extension for the binary
>        OpenPGP format (also known as "GPG key public ring"). The binary OpenPGP format works for all apt
>        versions, while the ASCII armored format works for apt version >= 1.4.
> 
>        Recommended: Instead of placing keys into the /etc/apt/trusted.gpg.d directory, you can place them
>        anywhere on your filesystem by using the Signed-By option in your sources.list and pointing to the
>        filename of the key. See sources.list(5) for details. Since APT 2.4, /etc/apt/keyrings is provided
>        as the recommended location for keys not managed by packages. When using a deb822-style
>        sources.list, and with apt version >= 2.4, the Signed-By option can also be used to include the full
>        ASCII armored keyring directly in the sources.list without an additional file.