Updated traefik example

[ycyin]

Is your feature request related to a problem? Please describe.
Currently traefik has been updated to v3.0+, the code in the example is still traefik v1.x
Describe the solution you'd like
Update the example documents in this project

Describe alternatives you've considered

Additional context

[Joxit]

Hello, thank you for using my project and submitting issues.

Unfortunately, the traefik example was a contribution, I will if you can update it and submit a PR, I will be happy to merge it.