[ImgBot] Optimize images

*Total -- 797.53kb -> 561.18kb (29.64%)

/image.png -- 184.50kb -> 98.11kb (46.82%)
/getprod.png -- 171.20kb -> 110.34kb (35.55%)
/postprod.png -- 91.32kb -> 62.11kb (31.98%)
/harga.png -- 271.39kb -> 222.36kb (18.07%)
/rancangan.png -- 79.12kb -> 68.25kb (13.74%)

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

Author: ImgBotApp