// nginx.conf expire 1d; // 86400s => 1day => expire -1; // no-cache
https://hlsbook.net/hls-nginx-rtmp-module/
https://m.blog.naver.com/bsmouse/222014454477
https://gist.github.com/mfuzailzubari/8bef96c8bc19584a09d41b4b208a9d00
https://github.com/SoloSynth1/nginx-hls-server