Document stale-while-revalidate

[wkillerud]

Minimal docs for eik-lib/service#688

[leftieFriele]

This is great!
Only thing I was thinking of was wether we should advise on using this and name the current approach as "legacy" or similar to indicate that the stale-while-revalidate is the better option.

[trygve-lie]

Only thing I was thinking of was wether we should advise on using this and name the current approach as "legacy" or similar to indicate that the stale-while-revalidate is the better option.

Lets test it a bit in prod first.

[trygve-lie]

Looks good 👍

[wkillerud]

Only thing I was thinking of was wether we should advise on using this and name the current approach as "legacy" or similar to indicate that the stale-while-revalidate is the better option.

For sure, but I wanted to do that down the line once we've gotten some prod experience with it. Stale-while-revalidate should perform better for most global users, so it's a sensible default for docs in not too long.