[ImgBot] Optimize images

[imgbot[bot]]

Beep boop. Your images are optimized!

Your image file size has been reduced by 23% 🎉

Details

File	Before	After	Percent reduction
/src/main/webapp/swagger-ui/dist/images/throbber.gif	9.04kb	5.97kb	33.94%
/src/main/webapp/content/images/hipster512.png	78.73kb	59.33kb	24.64%
/src/main/webapp/content/images/hipster384.png	57.24kb	43.73kb	23.60%
/src/main/webapp/content/images/hipster192.png	27.05kb	21.58kb	20.22%
/src/main/webapp/content/images/hipster256.png	39.82kb	32.18kb	19.21%
Total :	211.89kb	162.79kb	23.17%

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