Haproxy docs

https://www.haproxy.com/blog/accelerate-your-apis-by-using-the-haproxy-cache/

https://www.haproxy.com/blog/introduction-to-haproxy-acls/

https://www.haproxy.com/blog/introduction-to-haproxy-logging/

https://www.haproxy.com/blog/haproxy-log-customization/

Lua

• https://www.haproxy.com/blog/5-ways-to-extend-haproxy-with-lua/