K3s-cluster/nginx/ingress.yaml

apiVersion: traefik.containo.us/v1alpha1
kind: Middleware
metadata:
  name: stripprefix
spec:
  stripPrefix:
    prefixes:
      - /nginx

---
apiVersion: traefik.containo.us/v1alpha1
kind: IngressRoute
metadata:
  name: nginx-ingress
  annotations:
    "traefik.ingress.kubernetes.io/router.middlewares": default-stripprefix@kubernetescrd

spec:
  entryPoints:
    - web
  routes:
    - match: Host(`nginx.diogenes.halia`)
      kind: Rule
      services:
        - name: nginx-svc
          port: 80