[ImgBot] Optimize images

*Total -- 8,349.40kb -> 7,716.49kb (7.58%)

/assets/banner.png -- 63.95kb -> 50.91kb (20.39%)
/02.Flask/static/logo.png -- 2,450.75kb -> 2,137.11kb (12.8%)
/02.Flask/templates/assets/img/contact-bg.jpg -- 488.95kb -> 446.61kb (8.66%)
/02.Flask/templates/assets/img/home-bg.jpg -- 984.18kb -> 924.90kb (6.02%)
/02.Flask/templates/assets/img/post-bg.jpg -- 1,760.96kb -> 1,666.68kb (5.35%)
/02.Flask/templates/assets/img/about-bg.jpg -- 2,488.16kb -> 2,380.73kb (4.32%)
/02.Flask/templates/assets/img/post-sample-image.jpg -- 112.45kb -> 109.55kb (2.58%)

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

Author: ImgBotApp