Added a Github Action to build Docker images for AMD64 and ARM architectures

Author: ignytis

.github/workflows/docker-build.yaml

@@ -0,0 +1,111 @@
+name: Docker
+
+on:
+  push:
+    tags: [ 'v*.*.*' ]
+
+env:
+  # Use docker.io for Docker Hub if empty
+  REGISTRY: docker.io
+  # github.repository as <account>/<repo>
+  REGISTRY_IMAGE: <dockerhub_account_name_here>/hdkeygen
+
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        platform:
+          - linux/amd64
+          - linux/arm64
+    steps:
+      -
+        name: Prepare
+        run: |
+          platform=${{ matrix.platform }}
+          echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV
+      -
+        name: Checkout
+        uses: actions/checkout@v4
+      -
+        name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY_IMAGE }}
+      -
+        name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      -
+        name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: <dockerhub_account_name_here>
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      -
+        name: Build and push by digest
+        id: build
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          platforms: ${{ matrix.platform }}
+          file: Dockerfile
+          labels: ${{ steps.meta.outputs.labels }}
+          outputs: type=image,name=${{ env.REGISTRY_IMAGE }},push-by-digest=true,name-canonical=true,push=true
+      -
+        name: Export digest
+        run: |
+          mkdir -p /tmp/digests
+          digest="${{ steps.build.outputs.digest }}"
+          touch "/tmp/digests/${digest#sha256:}"
+      -
+        name: Upload digest
+        uses: actions/upload-artifact@v4
+        with:
+          name: digests-${{ env.PLATFORM_PAIR }}
+          path: /tmp/digests/*
+          if-no-files-found: error
+          retention-days: 1
+
+  merge:
+    runs-on: ubuntu-latest
+    needs:
+      - build
+    steps:
+      -
+        name: Download digests
+        uses: actions/download-artifact@v4
+        with:
+          path: /tmp/digests
+          pattern: digests-*
+          merge-multiple: true
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      -
+        name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY_IMAGE }}
+      -
+        name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: <dockerhub_account_name_here>
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      -
+        name: Create manifest list and push
+        working-directory: /tmp/digests
+        run: |
+          docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
+            $(printf '${{ env.REGISTRY_IMAGE }}@sha256:%s ' *)
+      -
+        name: Inspect image
+        run: |
+          docker buildx imagetools inspect ${{ env.REGISTRY_IMAGE }}:${{ steps.meta.outputs.version }}

Dockerfile

@@ -0,0 +1,13 @@
+FROM golang:alpine as builder
+
+
+WORKDIR /build
+COPY ./ ./
+RUN go mod download
+RUN CGO_ENABLED=0 go build -o ./hdkeygen
+
+
+FROM scratch
+WORKDIR /app
+COPY --from=builder /build/hdkeygen ./hdkeygen
+ENTRYPOINT ["./hdkeygen"]

README.md

@@ -31,6 +31,13 @@ Installation
 $ go install github.com/modood/hdkeygen@latest
 ```
 
+Running in Docker
+-----------------
+For security reasons it's recommended to start a Docker container with disabled networking:
+```
+$ docker run --network none --rm -it <dockerhub_account_name_here>/hdkeygen
+```
+
 Usage
 -----