Tracking 用户追踪

https://marvinblum.de/tracking
https://github.com/Kugelschieber/marvinblum
https://github.com/emvi/pirsch

https://www.goatcounter.com/
https://marvinblum.de/blog/server-side-tracking-without-cookies-in-go-OxdzmGZ1Bl
https://github.com/yuin/goldmark
https://dev.to/canro91/let-s-go-learn-go-in-30-days-3dg9