Why my Root Directory is empty when my docker image is deployed on a managed Kubernetes cluster?

Hi. I have created a local docker image and deployed it to a managed kubernetes cluster. I have tested the image locally and works. But when I deploy to the kubernetes cluster I am getting an error from Apache that the Root Directory is empty. I know that the MySQL server installation is missing. At tis step I wish to make sure that the pho files are correctly deployed.

This is my Dockerfile:

FROM php:7.4-apache
COPY wordpress/ /var/www/html
RUN chmod -R 755 /var/www/html
EXPOSE 80

And these are my YAML files to setup the kubernetes cluster:

apiVersion: v1
kind: Service
metadata:
  name: wordpress
  labels:
    app: wordpress
spec:
  ports:
    - port: 80
  selector:
    app: wordpress
  type: LoadBalancer
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: wp-pv-claim
  labels:
    app: wordpress
spec:
  accessModes:
    - ReadWriteOnce
  storageClassName: do-block-storage
  resources:
    requests:
      storage: 1Gi #put here your required storage capacity
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: wordpress
  labels:
    app: wordpress
spec:
  selector:
    matchLabels:
      app: wordpress
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: wordpress
    spec:
      containers:
      - name: wordpress
        image: ......my Docker Hub Image.....
        ports:
        - containerPort: 80
          name: wordpress
        volumeMounts:
        - name: wordpress-persistent-storage
          mountPath: /var/www/html #default root path for webserver
      imagePullSecrets:
        - name: docker-hub-cred #credentials to sync with Docker Hub & pull the image          
      volumes:
      - name: wordpress-persistent-storage
        persistentVolumeClaim:
          claimName: wp-pv-claim

I have connected to the local docker container and executed the ls command in the root directory and I can see the wordpress files, but when doing the same on the deployed pod, I am getting an empty root directory.

Any suggestions what is wrong?