improve help doc

fix: support cache 302 status code

Revert "[patch] allow caching it when http response code 302 is got f…

…rom upstream"

This reverts commit 5410435.

[patch] allow caching it when http response code 302 is got from upst…

…ream

Fix typo

update go.mod to v2

proxy/router: fix panic & gofmt

release v2.0.0-beta

release v1.0.0