[ImgBot] Optimize images

*Total -- 487.98kb -> 238.96kb (51.03%)

/apps/OpenSign/public/logo512.png -- 10.72kb -> 2.72kb (74.62%)
/apps/OpenSignServer/logo.png -- 86.48kb -> 24.83kb (71.28%)
/apps/OpenSign/src/assets/images/logo.png -- 86.48kb -> 24.83kb (71.28%)
/apps/OpenSign/public/static/js/assets/images/logo.2a7bff0c1189183fafe71d7d5b94e0cd.png -- 86.48kb -> 24.83kb (71.28%)
/apps/OpenSign/public/logo192.png -- 2.13kb -> 0.65kb (69.69%)
/apps/OpenSign/src/assets/images/dp.png -- 12.83kb -> 4.25kb (66.9%)
/apps/OpenSign/src/assets/images/folder.png -- 4.39kb -> 1.93kb (56.05%)
/apps/OpenSign/public/static/js/assets/images/logo-dark.png -- 95.21kb -> 57.21kb (39.91%)
/apps/OpenSignServer/public/assets/images/parse-logo.png -- 5.16kb -> 3.81kb (26.21%)
/apps/OpenSign/src/assets/images/pdf3.png -- 11.66kb -> 9.77kb (16.21%)
/apps/OpenSign/src/assets/images/login_img.svg -- 40.75kb -> 39.10kb (4.04%)
/apps/OpenSign/src/assets/images/recreatedoc.png -- 40.69kb -> 40.08kb (1.48%)
/apps/OpenSign/src/assets/images/pad.svg -- 5.00kb -> 4.94kb (1.07%)

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

Author: ImgBotApp