K3s-cluster/dashboard/ingress.yaml

apiVersion: traefik.containo.us/v1alpha1
kind: Middleware
metadata:
  name: stripprefix
  annotations:
    kubernetes.io/ingress.class: "traefik"
spec: 
  stripPrefix:
    prefixes:
      - /dashboard

---
apiVersion: traefik.containo.us/v1alpha1
kind: IngressRoute
metadata:
  name: kubernetes-dashboard-ingress
  namespace: kubernetes-dashboard
  annotations:
    "traefik.ingress.kubernetes.io/router.middlewares": default-stripprefix@kubernetescrd
spec:
  entryPoints:
    - web
  routes:
    - match: Host(`localhost`)
      kind: Rule
      services:
        - name: kubernetes-dashboard
          port: 80