[ImgBot] Optimize images

*Total -- 3,615.37kb -> 2,222.78kb (38.52%)

/client/public/logo512.png -- 19.29kb -> 5.89kb (69.47%)
/screenshots/Screenshot 2021-03-16 at 10.26.25.png -- 123.38kb -> 44.87kb (63.63%)
/client/public/logo192.png -- 8.05kb -> 3.40kb (57.82%)
/screenshots/Screenshot 2021-03-16 at 09.54.02.png -- 358.90kb -> 176.40kb (50.85%)
/screenshots/Screenshot 2021-03-16 at 09.48.21.png -- 414.54kb -> 212.45kb (48.75%)
/screenshots/Screenshot 2021-03-16 at 10.23.13.png -- 428.47kb -> 221.38kb (48.33%)
/screenshots/Screenshot 2021-03-16 at 09.54.20.png -- 445.58kb -> 232.71kb (47.78%)
/screenshots/Screenshot 2021-03-16 at 09.28.22.png -- 556.45kb -> 303.88kb (45.39%)
/screenshots/Screenshot 2021-03-16 at 09.28.10.png -- 493.46kb -> 291.65kb (40.9%)
/client/src/img/yami.jpg -- 759.22kb -> 722.15kb (4.88%)
/client/src/logo.svg -- 8.01kb -> 8.01kb (0.01%)

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

Author: ImgBotApp