We want to include them in the tarballs alongside the wiki. I tried
toggling the include LFS in archives option, but it quickly used up most
of our free LFS traffic. So let's move these files in-repo, they are not
that big.
I optimized the files with:
oxipng -o max --strip safe docs/wiki/img/*.png
Need to rememeber to do that for any new .png files.