sig-auth/test_assets/Caddyfile

http://localhost:8001 {
  forward_auth http://localhost:8080 {
    uri /auth
    
    header_up X-Forwarded-Content-Length {header.content-length}

    copy_headers Remote-User
  }

  templates
  respond `Hello, {{.Req.Header.Get "Remote-User"}}`
}