fix(middleware): use relative URL for sign-in page `callbackUrl` (#4534)
* Use relative URL for middleware's signin callbackUrl
* Include params to callbackUrl if any
* For testing purpose, append params to existing link for test instead of create another one
* Update apps/dev/components/header.js
Co-authored-by: CODY Mai <nhan.mai@shiftasia.com>
Co-authored-by: Thang Vu <31528554+ThangHuuVu@users.noreply.github.com>