Add job to build docker images without CGO

.github/workflows/release.yml

@@ -79,3 +79,17 @@ jobs:
       docker_image: smallstep/step-kms-plugin
       docker_file: docker/Dockerfile
     secrets: inherit
+
+  build_upload_docker_cloud:
+    name: Build & Upload Cloud Only Docker Images
+    needs: create_release
+    permissions:
+      id-token: write
+      contents: write
+    uses: smallstep/workflows/.github/workflows/docker-buildx-push.yml@main
+    with:
+      platforms: linux/amd64,linux/arm64
+      tags: ${{ needs.create_release.outputs.docker_tags }}
+      docker_image: smallstep/step-kms-plugin-cloud
+      docker_file: docker/Dockerfile.cloud
+    secrets: inherit

docker/Dockerfile.cloud

@@ -0,0 +1,15 @@
+FROM golang:alpine AS builder
+
+WORKDIR /src
+COPY . .
+
+RUN apk add --no-cache git make
+RUN make V=1 CGO_ENABLED=0 build
+
+FROM smallstep/step-cli:latest
+
+COPY --from=builder /src/bin/step-kms-plugin /usr/local/bin/step-kms-plugin
+
+USER step
+
+CMD ["/bin/bash"]