[ImgBot] Optimize images

*Total -- 3,980.86kb -> 3,723.58kb (6.46%)

/client/src/Assets/technical.png -- 230.23kb -> 167.92kb (27.07%)
/client/src/Assets/creatives.png -- 623.87kb -> 468.18kb (24.96%)
/client/src/Assets/corporate.png -- 227.64kb -> 202.50kb (11.05%)
/client/src/Assets/background.jpg -- 406.75kb -> 397.34kb (2.31%)
/client/src/Assets/Back.gif -- 2,492.38kb -> 2,487.64kb (0.19%)

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

Author: ImgBotApp