How to set custom query string parameters in Middleware - errors - query

Traefik Traefik v2
1

we are using following configuration for our maintenance page in dynamic yaml file

middlewares:
    test-errorpage:
      errors:
        status:
          - 400
          - 402-599
        service: serviceError
        query: "/Maintenance"

we are trying to fetch the request parameters and pass it as query string as below

middlewares:
    test-errorpage:
      errors:
        status:
          - 400
          - 402-599
        service: serviceError
        query: "/Maintenance?parameter1={customheadervalues}"

would like to know the options in the Traefik. We are using Traefik V2.7.1