ci: add multi-platform docker build (amd64 + arm64)

- Add QEMU for cross-platform emulation
- Add platforms: linux/amd64,linux/arm64
- Update Dockerfile with build dependencies (musl-dev, openssl)
- Add ca-certificates for HTTPS support in runtime image

Author: overtrue

.github/workflows/docker.yml

@@ -25,8 +25,11 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v4
 
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v2
+        uses: docker/setup-buildx-action@v3
 
       - name: Log in to Docker Hub
         uses: docker/login-action@v3
@@ -38,6 +41,7 @@ jobs:
         uses: docker/build-push-action@v6
         with:
           context: .
+          platforms: linux/amd64,linux/arm64
           push: true
           tags: | 
             rustfs/rc:${{ env.image_tag }}

Dockerfile

@@ -4,12 +4,18 @@ LABEL maintainer="hello@rustfs.com"
 
 WORKDIR /app
 
+# Install build dependencies for Alpine
+RUN apk add --no-cache musl-dev openssl-dev openssl-libs-static
+
 COPY . .
 
 RUN cargo build --release
 
 FROM alpine:3.23
 
+# Install CA certificates for HTTPS
+RUN apk add --no-cache ca-certificates
+
 COPY --from=builder /app/target/release/rc /usr/bin/rc
 COPY --from=builder /app/LICENSE-* /licenses/