[ImgBot] Optimize images

*Total -- 1,322.09kb -> 778.29kb (41.13%)

/public/computer1.gif -- 3.98kb -> 1.00kb (74.75%)
/public/rn-frustration.png -- 202.98kb -> 108.97kb (46.31%)
/public/rn-intro.png -- 1,115.13kb -> 668.31kb (40.07%)

Signed-off-by: ImgBotApp <[email protected]>

Author: ImgBotApp