Reactjs – Issue with ImagePullBackOff error in Kubernetes for React App

I am experiencing a problem with my deployment in Kubernetes, specifically getting the ImagePullBackOff error for one of my containers. I have verified that the image exists in my container registry and that the credentials are correct.

Could you help me understand what might be causing this error? I have already checked registry permissions and credentials, but I cannot resolve the issue.

Thanks in advance for any assistance!

Dockerfile:

    //build command:  docker build -t my-simple-app .

    FROM node:alpine
    ENTRYPOINT ["sh", "/docker-entrypoint.sh"]
    WORKDIR /app
    COPY package*.json ./
    RUN npm install
    COPY . .
    EXPOSE 3000
    CMD ["npm", "start"]

kubectl get pods:

react-app-deployment-7854bbdb98-c4gzf   0/1     ImagePullBackOff   0          17s
react-app-deployment-7854bbdb98-dvzls   0/1     ErrImagePull       0          17s
react-app-deployment-7854bbdb98-vb7pm   0/1     ImagePullBackOff   0          17s

service.yaml

apiVersion: v1
kind: Service
metadata:
  name: react-app-service
spec:
  selector:
    app: react-app
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  type: LoadBalancer

deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: react-app-deployment
spec:
  replicas: 3
  selector:
    matchLabels:
      app: react-app
  template:
    metadata:
      labels:
        app: react-app
    spec:
      containers:
        - name: react-app-container
          image: my-simple-app  # Use the image name and tag you built earlier
          ports:
            - containerPort: 3000  # Adjust the port as needed