Fix the random image on the homepage.
Fix the random image on the homepage.

zhelezko/acgd-learn-the-web.github.io,acgd-learn-the-web/acgd-learn-the-web.github.io,acgd-learn-the-web/www,acgd-learn-the-web/www,acgd-learn-the-web/www,acgd-learn-the-web/www,acgd-learn-the-web/acgd-learn-the-web.github.io,acgd-learn-the-web/www,zhelezko/acgd-learn-the-web.github.io