[ImgBot] Optimize images

*Total -- 337.51kb -> 203.53kb (39.7%)

/static/uploads/trpcblog.png -- 54.59kb -> 25.69kb (52.95%)
/static/uploads/mysql_docker_blog_cover.png -- 282.92kb -> 177.85kb (37.14%)

Signed-off-by: ImgBotApp <ImgBotHelp@gmail.com>

Author: ImgBotApp