removed multi-architecture build support and added GitHub Actions cache for faster builds

Author: ibex088

.github/workflows/docker-publish.yml

@@ -53,9 +53,6 @@ jobs:
           echo "Waiting a bit for redis..."
           sleep 5
 
-      - name: Set up QEMU for multi-arch builds
-        uses: docker/setup-qemu-action@v3
-
       - name: Build Docker image (no push)
         uses: docker/build-push-action@v5
         with:
@@ -65,6 +62,8 @@ jobs:
           load: true
           platforms: linux/amd64
           tags: chauhansomay/nodejs-api:ci-${{ github.sha }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
 
       - name: Run API container for smoke test
         run: |
@@ -125,14 +124,15 @@ jobs:
           echo "Smoke test passed ✅"
           docker stop nodejs-api-test
 
-      - name: Build and push multi-arch image to Docker Hub
+      - name: Push image to Docker Hub
         uses: docker/build-push-action@v5
         with:
           context: .
           file: ./Dockerfile
           push: true
-          platforms: linux/amd64,linux/arm64
+          platforms: linux/amd64
           tags: chauhansomay/nodejs-api:latest
+          cache-from: type=gha
 
       - name: Docker compose down
         if: always()