added dockerfile and multiarch build job in goreleaser workflow. fixes …

…go-task#1801

.github/workflows/release.yml

@@ -24,3 +24,30 @@ jobs:
           args: release --clean
         env:
           GITHUB_TOKEN: ${{secrets.GH_PAT}}
+
+  docker:
+    runs-on: ubuntu-latest
+    needs: goreleaser
+    if: ${{ secrets.DOCKER_HUB_USERNAME && secrets.DOCKER_HUB_TOKEN }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKER_HUB_USERNAME }}
+          password: ${{ secrets.DOCKER_HUB_TOKEN }}
+
+      - name: Build and Push Docker image
+        uses: docker/build-push-action@v6
+        platforms: linux/amd64,linux/arm64
+        with:
+          context: .
+          file: ./Dockerfile
+          push: true
+          tags: |
+            go-task/task:latest

Dockerfile

@@ -0,0 +1,9 @@
+FROM golang:1.23.2-alpine
+
+COPY . /app
+
+WORKDIR /app
+
+RUN /app/install-task.sh -b /usr/local/bin
+
+ENTRYPOINT ["task"]