Hiding sub path

Here is an example using docker-compose leveraging the addprefix middleware:

version: "3.9"
services:
  traefik:
    image: traefik:v2.5.2
    command:
      - --api.insecure
      - --log.level=debug
      - --providers.docker.exposedByDefault=false

    volumes:
      - /var/run/docker.sock:/var/run/docker.sock:ro

    ports:
      - "8080:8080"
      - "80:80"

  whoami:
    image: traefik/whoami
    labels:
      - traefik.enable=true
      - traefik.http.routers.whoami.rule=Host(`whoami.localhost`)
      - traefik.http.routers.whoami.middlewares=add-service-prefix
      - traefik.http.middlewares.add-service-prefix.addprefix.prefix=/service

Then, when a request is made with curl like curl http://whoami.localhost/path the response (which returns the request sent) is the following:

Hostname: fb5a885d9338
IP: 127.0.0.1
IP: 172.20.0.2
RemoteAddr: 172.20.0.3:47414
GET /service/path HTTP/1.1
...

And as expected the requested path is /service/path.

Is it the behavior you are looking for?