Cache Controls: #

max-age no-store no-cache must-revalidate public, private immutable stale-while-revalidate stale-if-error

Other #

pragma - old tech expires - old tech vary - for cdns, for language cdns

Heuristic caching #

If-Modified-Since ETag/If-None-Match Cache busting

https://www.youtube.com/watch?v=Cy2ZJOBgk84&t=314s

caddyfile syntax

header {
        Cache-Control no-cache, no-store, must-revalidate
        Pragma no-cache
        Expires 0
}