bug#59894: [PATCH] Add dockerfile-ts-mode

[Eli Zaretskii]

> Cc: casouri@gmail.com
> Date: Thu, 08 Dec 2022 02:11:10 +0000
> From: Randy Taylor <dev@rjt.dev>
> 
> Not adding to auto-mode-alist since the dockerfile-mode package exists.

That mode is not in Emacs, so I see no reason not to add this new mode
to auto-mode-alist.

Thanks.