reverted GHA builds to qemu

Author: rsubr

.github/workflows/build-release.yml

@@ -1,17 +1,20 @@
-name: multi-arch docker build using native runners
+name: multi-arch docker build using qemu
 
 on:
   push:
-    branches: "noble"
+    branches: noble
   workflow_dispatch:
 
 jobs:
-  build-amd64:
-    runs-on: ubuntu-24.04
+  build:
+    runs-on: ubuntu-20.04
 
     steps:
       - name: checkout code
         uses: actions/checkout@v4
+        
+      - name: set up qemu for linux/arm64
+        uses: docker/setup-qemu-action@v3
 
       - name: install buildx
         id: buildx
@@ -22,32 +25,9 @@ jobs:
       - name: login to docker hub
         run: echo "${{ secrets.DOCKER_PASSWORD }}" | docker login -u "${{ secrets.DOCKER_USERNAME }}" --password-stdin
 
-      - name: build amd64 image and push to docker hub
+      - name: build multi-arch image and push to docker hub
         run: |
           docker buildx build --push \
             --tag rsubr/php-apache-ubuntu:noble  \
             --tag rsubr/php-apache-ubuntu:24.04  \
-            --platform linux/amd64 .
-
-  build-arm64:
-    runs-on: ubuntu-24.04-arm
-    
-    steps:
-      - name: checkout code
-        uses: actions/checkout@v4
-
-      - name: install buildx
-        id: buildx
-        uses: docker/setup-buildx-action@v3
-        with:
-          version: latest
-
-      - name: login to docker hub
-        run: echo "${{ secrets.DOCKER_PASSWORD }}" | docker login -u "${{ secrets.DOCKER_USERNAME }}" --password-stdin
-
-      - name: build arm64 image and push to docker hub
-        run: |
-          docker buildx build --push \
-            --tag rsubr/php-apache-ubuntu:noble  \
-            --tag rsubr/php-apache-ubuntu:24.04  \
-            --platform linux/arm64 .
+            --platform linux/amd64,linux/arm64 .