Document how to obtain the real client IP #327
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Services running behind sish can access the client IP via
X-Forwarded-For
header, which is set here: https://github.com/antoniomika/oxy/blob/5924ea01c950a0c86c95ccb3f0cb90c38702f3a1/forward/rewrite.go#L23The use-case for this is enforcing IP bans or IP allow-lists for services running behind sish.
Replaces this PR: picosh/docs#8