feat: add arm64 support

.github/workflows/cd.yaml

@@ -37,19 +37,26 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-      - name: Docker metadata-action
-        id: meta
-        uses: docker/metadata-action@v5
+      - name: Set up QEMU
+        id: qemu
+        uses: docker/setup-qemu-action@v3
         with:
-          images: robsonpeixoto/echo-server
+          platforms: linux/amd64,linux/arm64
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
+        with:
+          platforms: ${{ steps.qemu.outputs.platforms }}
       - name: Login to Docker Hub
         if: github.event_name != 'pull_request'
         uses: docker/login-action@v3
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
+      - name: Docker metadata-action
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: robsonpeixoto/echo-server
       - name: Build and push
         uses: docker/build-push-action@v6
         with:
@@ -59,3 +66,4 @@ jobs:
           labels: ${{ steps.meta.outputs.labels }}
           cache-from: type=gha
           cache-to: type=gha,mode=max
+          platforms: ${{ steps.qemu.outputs.platforms }}

Dockerfile

@@ -1,11 +1,19 @@
-FROM golang:1.22.5-alpine3.19 AS builder
-WORKDIR /usr/src/app
-COPY go.mod go.sum ./
-RUN go mod download && go mod verify
-COPY . .
-ENV CGO_ENABLED=0 GOOS=linux GOARCH=amd64
-RUN --mount=type=cache,target=/root/.cache/go-build go build -o  /usr/local/bin/app ./...
+ARG GO_VERSION=1.22.5
+ARG ALPINE_VERSION=3.20
 
-FROM alpine:3.20
+FROM --platform=$BUILDPLATFORM golang:${GO_VERSION}-alpine${ALPINE_VERSION} AS builder
+ARG TARGETOS
+ARG TARGETARCH
+WORKDIR /src
+RUN --mount=type=cache,target=/go/pkg/mod \
+  --mount=type=bind,source=go.mod,target=go.mod \
+  --mount=type=bind,source=go.sum,target=go.sum \
+  go mod download -x
+
+RUN --mount=type=cache,target=/go/pkg/mod \
+  --mount=type=bind,target=. \
+  GOOS=${TARGETOS} GOARCH=${TARGETARCH} go build -o /usr/local/bin/app .
+
+FROM --platform=$BUILDPLATFORM alpine:${ALPINE_VERSION}
 COPY --from=builder /usr/local/bin/app /usr/local/bin/app
-CMD ["app"]
+CMD ["/usr/local/bin/app"]