Added the Dockerfile for the score-k8s and release too

.dockerignore

@@ -0,0 +1,6 @@
+*/
+!go.mod
+!go.sum
+!.git/
+!internal/
+!main.go/

.github/workflows/release.yaml

@@ -11,7 +11,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
         with:
-          fetch-depth: 0
+          fetch-depth: 0 
       - name: Fetch all tags
         run: git fetch --force --tags
       - name: Set up Go
@@ -26,4 +26,20 @@ jobs:
           args: release --clean
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          TAP_GITHUB_TOKEN: ${{ secrets.TAP_GITHUB_TOKEN }}
+          TAP_GITHUB_TOKEN: ${{ secrets.TAP_GITHUB_TOKEN }}  
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push docker image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: ghcr.io/score-spec/score-k8s:${{ github.ref_name }}

Dockerfile

@@ -0,0 +1,27 @@
+# Use the official Golang image to create a build artifact.
+# This is based on Debian and sets the GOPATH to /go.
+# https://hub.docker.com/_/golang
+FROM golang:1.23 AS builder
+
+# Set the current working directory inside the container.
+WORKDIR /go/src/github.com/score-spec/score-k8s
+
+# Copy just the module bits
+COPY go.mod go.sum ./
+RUN go mod download
+
+# Copy the entire project and build it.
+COPY . .
+RUN CGO_ENABLED=0 GOOS=linux go build -o /usr/local/bin/score-k8s .
+
+# We can use scratch since we don't rely on any linux libs or state.
+FROM scratch
+
+# Set the current working directory inside the container.
+WORKDIR /score-compose
+
+# Copy the binary from the builder image.
+COPY --from=builder /usr/local/bin/score-k8s /usr/local/bin/score-k8s
+
+# Run the binary.
+ENTRYPOINT ["/usr/local/bin/score-k8s"]