use matrix strategy to build for each platform

Author: adnanhashmi09

.github/workflows/build.yml

@@ -4,36 +4,45 @@ on:
   release:
     types: [published]
   workflow_dispatch:
-    branches: [ "master", "main" ]
+    branches: ["master", "main"]
 
 jobs:
-  push_to_registry:
-    name: Push Docker image to Docker Hub
+
+  build-and-push:
+    name: Build and Push Docker Image
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        platform: [linux/amd64, linux/arm64]
+    
     steps:
       - name: Checkout
         uses: actions/checkout@v4
+        
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3
+        
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
+        
       - name: Login to Docker Hub
         uses: docker/login-action@v3
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
+          
       - name: Extract metadata (tags, labels) for Docker
         id: meta
         uses: docker/metadata-action@v5
         with:
           images: middlewareeng/middleware
-
+          
       - name: Build and push Docker image
         uses: docker/build-push-action@v5
         with:
           context: .
           file: ./Dockerfile
-          platforms: linux/amd64,linux/arm64
+          platforms: ${{ matrix.platform }}
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}