[ImgBot] Optimize images

*Total -- 2,291.20kb -> 1,738.62kb (24.12%)

/img-config/setup-be1.png -- 31.17kb -> 16.03kb (48.58%)
/img/preview-fe.png -- 184.50kb -> 98.11kb (46.82%)
/img-config/setup-fe1.png -- 159.38kb -> 103.90kb (34.81%)
/img-config/setup-db1.png -- 73.27kb -> 47.82kb (34.73%)
/img-config/setup-be2.png -- 64.66kb -> 42.37kb (34.48%)
/img-config/setup-fe2.png -- 146.54kb -> 96.72kb (34%)
/img-config/fe.png -- 58.09kb -> 38.64kb (33.49%)
/img-config/setup-lb1.png -- 127.84kb -> 85.92kb (32.79%)
/img/vm-amd.png -- 17.20kb -> 12.81kb (25.53%)
/img/rest-client-history.png -- 206.56kb -> 167.63kb (18.85%)
/img/testweb1.png -- 245.06kb -> 199.77kb (18.48%)
/img/testweb2.png -- 205.48kb -> 168.96kb (17.77%)
/img/rest-client-analyze.png -- 165.55kb -> 137.20kb (17.13%)
/img/image.png -- 208.46kb -> 173.19kb (16.92%)
/img/locust3.jpg -- 96.73kb -> 84.67kb (12.47%)
/img/locust4.jpg -- 95.17kb -> 83.37kb (12.4%)
/img/locust1.jpg -- 106.19kb -> 93.27kb (12.17%)
/img/locust2.jpg -- 99.36kb -> 88.27kb (11.16%)

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

Author: ImgBotApp