add arm builds

Author: scott-the-programmer

.github/workflows/ci.yaml

@@ -24,6 +24,12 @@ jobs:
       - name: Check out the repo
         uses: actions/checkout@v2
 
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
       - name: Log in to the Container registry
         uses: docker/login-action@v1 
         with:
@@ -36,4 +42,5 @@ jobs:
         with:
           context: .
           push: true
+          platforms: linux/amd64,linux/arm64
           tags: ghcr.io/${{ github.repository }}/term-nz:latest