ci: add qemu/buildx actions to support cross platform builds

Signed-off-by: TJ Hoplock <[email protected]>

Author: tjhop

.github/workflows/release.yml

@@ -17,6 +17,10 @@ jobs:
         uses: actions/checkout@v4
         with:
           fetch-depth: 0
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
       - run: git fetch --force --tags
       - name: Set up Go
         uses: actions/setup-go@v5

Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:latest as certs
+FROM alpine:latest AS certs
 RUN apk update && apk add ca-certificates
 
 FROM cgr.dev/chainguard/busybox:latest