Add arm64 image

Author: kateinoigakukun

.github/workflows/release.yml

@@ -12,14 +12,17 @@ jobs:
       matrix:
         include:
           - dockerfile: ./5.8/ubuntu/18.04/Dockerfile
+            platforms: 'linux/amd64'
             tags:
               - ghcr.io/swiftwasm/swift:5.8-bionic
               - ghcr.io/swiftwasm/swift:bionic
           - dockerfile: ./5.8/ubuntu/20.04/Dockerfile
+            platforms: 'linux/amd64'
             tags:
               - ghcr.io/swiftwasm/swift:5.8-focal
               - ghcr.io/swiftwasm/swift:focal
           - dockerfile: ./5.8/ubuntu/22.04/Dockerfile
+            platforms: 'linux/amd64,linux/arm64'
             tags:
               - ghcr.io/swiftwasm/swift:5.8-jammy
               - ghcr.io/swiftwasm/swift:jammy
@@ -29,6 +32,7 @@ jobs:
       - uses: actions/checkout@v3
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v2
+      - uses: docker/setup-qemu-action@v2
       - name: Login to DockerHub
         uses: docker/login-action@v2
         with:
@@ -38,6 +42,7 @@ jobs:
       - name: Push ${{ matrix.dockerfile }}
         uses: docker/build-push-action@v3
         with:
+          platforms: ${{ matrix.platforms }}
           file: ${{ matrix.dockerfile }}
           push: true
           tags: ${{ join(matrix.tags, ',') }}