Refactor CD workflow by removing kubectl and envsubst installation steps for streamlined deployment

.github/workflows/cd.yml

@@ -50,27 +50,15 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v4
       
-      # Step 2: Install kubectl (Kubernetes CLI tool)
-      - name: Install kubectl
-        uses: azure/setup-kubectl@v4
-        with:
-          version: 'latest'
-      
-      # Step 3: Install envsubst (for environment variable substitution)
-      - name: Install envsubst
-        run: |
-          sudo apt-get update
-          sudo apt-get install -y gettext-base
-      
-      # Step 4: Make CD script executable
+      # Step 2: Make CD script executable
       - name: Make CD script executable
         run: chmod +x script/cd.sh
       
-      # Step 5: Deploy to Kubernetes
+      # Step 3: Deploy to Kubernetes
       - name: Deploy to Kubernetes
         run: ./script/cd.sh deploy
       
-      # Step 6: Output deployment summary
+      # Step 4: Output deployment summary
       - name: Deployment Summary
         if: success()
         run: |
@@ -85,7 +73,7 @@ jobs:
           echo "" >> $GITHUB_STEP_SUMMARY
           echo "**Deployment Time:** $(date -u +'%Y-%m-%d %H:%M:%S UTC')" >> $GITHUB_STEP_SUMMARY
       
-      # Step 7: Output failure message
+      # Step 5: Output failure message
       - name: Deployment Failed
         if: failure()
         run: |