ci: add multiple docker image arch

Author: JesusPaz

.github/workflows/docker.yml

@@ -13,9 +13,20 @@ env:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    name: Build ${{ matrix.platform }}
+    runs-on: ${{ matrix.runner }}
     permissions:
       contents: read
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - arch: amd64
+            platform: linux/amd64
+            runner: ubuntu-latest
+          - arch: arm64
+            platform: linux/arm64
+            runner: ubuntu-24.04-arm
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -36,15 +47,55 @@ jobs:
           images: ${{ env.IMAGE_NAME }}
           tags: |
             type=ref,event=tag
-            type=ref,event=branch
+            type=raw,value=latest,enable={{is_default_branch}}
             type=sha
+          flavor: |
+            suffix=-${{ matrix.arch }}
 
-      - name: Build and push
+      - name: Build and push (${{ matrix.platform }})
         uses: docker/build-push-action@v6
         with:
           context: .
           file: ./Dockerfile
           push: true
-          platforms: linux/amd64
+          platforms: ${{ matrix.platform }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
+
+  manifest:
+    name: Publish multi-arch manifests
+    runs-on: ubuntu-latest
+    needs: build
+    permissions:
+      contents: read
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Docker metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.IMAGE_NAME }}
+          tags: |
+            type=ref,event=tag
+            type=raw,value=latest,enable={{is_default_branch}}
+            type=sha
+
+      - name: Create multi-arch manifests
+        run: |
+          while IFS= read -r tag; do
+            docker buildx imagetools create \
+              -t "$tag" \
+              "$tag-amd64" \
+              "$tag-arm64"
+          done <<< "${{ steps.meta.outputs.tags }}"

Dockerfile

@@ -1,14 +1,16 @@
 ARG NODE_VERSION=22
 ARG GO_VERSION=1.24
 
-FROM node:${NODE_VERSION}-alpine AS frontend
+FROM --platform=$BUILDPLATFORM node:${NODE_VERSION}-alpine AS frontend
 WORKDIR /app
 COPY web/package.json web/package-lock.json ./web/
 RUN cd web && npm ci
 COPY web ./web
 RUN cd web && npm run build
 
-FROM golang:${GO_VERSION}-alpine AS backend
+FROM --platform=$BUILDPLATFORM golang:${GO_VERSION}-alpine AS backend
+ARG TARGETOS
+ARG TARGETARCH
 WORKDIR /app
 RUN apk add --no-cache git ca-certificates
 COPY go.mod go.sum ./
@@ -21,9 +23,9 @@ COPY web/tailwind.config.cjs web/postcss.config.cjs web/vite.config.ts web/tscon
 COPY web/src ./web/src
 COPY --from=frontend /app/web/dist ./web/dist
 RUN mkdir -p internal/static && rm -rf internal/static/dist && cp -r web/dist internal/static/dist
-RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o /dashboard ./cmd/dashboard
+RUN CGO_ENABLED=0 GOOS=${TARGETOS} GOARCH=${TARGETARCH} go build -o /dashboard ./cmd/dashboard
 
-FROM gcr.io/distroless/base-debian12:nonroot
+FROM --platform=$TARGETPLATFORM gcr.io/distroless/base-debian12:nonroot
 WORKDIR /app
 COPY --from=backend /dashboard /app/dashboard
 ENV LISTEN_ADDR=:9090