Redirect path to service outsite docker

Hello traefik community,

I'm currently struggling to get a local installed service working together with my docker services.
I have running multiple services on the sub path /app1 and /app2, now I want to set to /app3 an app outside from docker that's currently running under https://[my-ip]:9090.
The app3 is cockpit that can't run under docker.
What I'm getting is only a 404 page not found, like https://[my-ip]/cockpit isn't existing.

Can I achieve this also with the new label config style in the docker compose, but keep in mind this question counts only if we get it previously working?

File: docker-compose.yml

version: '3.7'
services:
  traefik:
    restart: always
    image: traefik:v2.3.2
    ports:
      - "80:80"
      - "443:443"
      - "8080:8080"
    networks:
      - traefik01
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock:ro
      - ./traefik/traefik.log:/var/log/traefik.log
      - ./traefik/traefik.toml:/traefik.toml
      - ./traefik/traefik_dynamic.toml:/traefik_dynamic.toml
      - ./traefik/acme.json:/acme.json


networks:
  traefik01:
    driver: bridge

File: traefik.toml

[log]
  level = "DEBUG"
  filePath = "/var/log/traefik.log"

[entryPoints]
  [entryPoints.web]
    address = ":80"
    [entryPoints.web.http.redirections.entryPoint]
      to = "websecure"
      scheme = "https"

  [entryPoints.websecure]
    address = ":443"

[api]
  debug = true
  dashboard = true
  insecure = true

[certificatesResolvers.lets-encrypt.acme]
  email = "test@test.de"
  storage = "acme.json"
  caServer = "https://acme-staging-v02.api.letsencrypt.org/directory"
  [certificatesResolvers.lets-encrypt.acme.tlsChallenge]

[providers.docker]
  watch = true
  network = "traefik01"

[providers.file]
  filename = "traefik_dynamic.toml"

FIle: traefik_dynamic.toml

# http routing section
[http]
  [http.routers]
    # Define a connection between requests and services
    [http.routers.cockpit]
      rule = "PathPrefix(`/cockpit{regex:$$|/.*}`)"
      middlewares = ["cockpit-stripprefix"]
      # If the rule matches, forward to the cockpit service (declared below)
      service = "cockpit"
      [http.routers.cockpit.tls]
          certResolver = "lets-encrypt"
    [http.routers.api]
      service = "api@internal"
      [http.routers.api.tls]
          certResolver = "lets-encrypt"

[http.middlewares]
  [http.middlewares.cockpit-stripprefix.stripPrefix]
    prefixes = ["/cockpit"]

  [http.services]
    # Define how to reach an existing service on our infrastructure
    [http.services.cockpit.loadBalancer]
      [[http.services.cockpit.loadBalancer.servers]]
        url = "http://<my-ip>:9090/"

Nobody has a answer for my question?

I think your pathprefix is the cause. To be sure if have traefik access logs you can see what router(if any) is handling the request.

Have your tried just PathPrefix(`/cockpit`) or PathPrefix(`/cockpit/`)

I tried it already.
But I need all sub paths redirected to the app is this wrong?

That is what PathPrefix() will do. Otherwise you would use Path()

You sir, are my hero for today. Thanks for those responses!