Recently I am learning kubernetes. I made a k8s cluster and deployed nginx and my app service on it, both nginx and the app service were exposed on port 80, I can only get to nginx default landing page when I try to access the external IP address on port 80, am I doing something wrong and how can I fix that, need help 🤨 I deploy nginx with this commands

kubectl create deployment nginx --image=nginx:1.21.1
kubectl expose deployment nginx --external-ip=$MASTER_IP --port=80 --target-port=80

This is yam file for my service

apiVersion: v1
kind: Service
metadata:
  name: node
  labels:
    app: node
    tier: backend
spec:
  type: LoadBalancer
  ports:
    - port: 80
      targetPort: 3000
  # Replace with the IP of your minikube node / master node
  externalIPs:
    - xxx.xxx.xxx.xxx
  selector:
    app: node
    tier: backend