I had exactly the same issue few weeks ago! Getting Apache's "It works!" page instead of the whoami response was driving me crazy.

@HansKilian is right that it's weird - your docker ps shows Traefik binding to port 80 correctly, so something else is intercepting the requests.

First, check what's actually using port 80:

sudo lsof -i :80

If you see Apache there, that's your problem - it's intercepting before Docker gets the request.

@YuvarajM's suggestion is solid - try moving Traefik to another port:

ports:
  - "8081:80"  # Change this line
  - "8080:8080"

Then test: curl -H "Host: whoami.docker.localhost" http://127.0.0.1:8081

Or go with @DavidMaze's path-based routing approach (honestly, this avoids all the DNS headaches):

labels:
  - "traefik.http.routers.whoami.rule=PathPrefix(`/whoami`)"

Access via: http://localhost:8081/whoami

@HansKilian mentioned checking your Docker context - this caught me once too:

docker context ls

Make sure the * is on default, not desktop-linux. Sometimes WSL does weird things with contexts.

@Z4-tier's debugging tip is gold - connect directly to the container:

docker exec -it traefik-docker-rp-reverse-proxy-1 sh
# Inside container:
wget -qO- --header="Host: whoami.docker.localhost" http://localhost

Also check Traefik's dashboard at http://localhost:8080 - you should see your whoami service listed there. If it's not showing up, there's definitely a config issue.

Since you got "Move Permanently" when testing @YuvarajM's suggestion, Traefik might be trying to redirect HTTP to HTTPS. Try adding -L to follow redirects:

curl -L -H "Host: whoami.docker.localhost" http://127.0.0.1:8081

The port change solution usually fixes both the Apache conflict and WSL networking issues. Let me know which approach works!