ci: build and push multi-arch images

.github/workflows/check.yaml

@@ -332,6 +332,9 @@ jobs:
             type=semver,pattern={{major}}
             type=sha
 
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v1
 
@@ -347,6 +350,7 @@ jobs:
         uses: docker/build-push-action@v2
         with:
           context: .
+          platforms: linux/amd64,linux/arm64
           push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}

Dockerfile

@@ -1,8 +1,9 @@
-ARG RUSTC_VERSION=1.55.0
+ARG RUSTC_VERSION=1.56.0
 
 # cargo-chef helps with caching dependencies between builds
-FROM lukemathwalker/cargo-chef:latest-rust-${RUSTC_VERSION} AS chef
+FROM docker.io/library/rust:${RUSTC_VERSION}-slim AS chef
 WORKDIR /app
+RUN cargo install --locked cargo-chef
 
 FROM chef AS planner
 COPY . .