Adding Container build infrastructure

.github/workflows/container.yaml

@@ -0,0 +1,44 @@
+name: Build Container Image
+
+on:
+  release:
+    types: [released]
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Docker buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login registry ${{ env.REGISTRY }}
+        uses: docker/login-action@v3
+        if: github.event_name != 'pull_request'
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Container metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          image: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+      - name: Build and push Container image
+        id: container-build
+        uses: docker/build-push-action@v5
+        with:
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labeles }}

Dockerfile

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+FROM golang:1.22.3 as build
+ARG tags=docker-build-versionless
+WORKDIR /go/src/app
+COPY . .
+ENV TAGS=${tags}
+RUN CGO_ENABLED=0 go build -tags ${TAGS} -o bin/ ./cmd/icalm-server/
+
+FROM gcr.io/distroless/static-debian12:nonroot
+COPY --from=build /go/src/app/bin/* /usr/bin/
+ENTRYPOINT ["/usr/bin/icalm-server"]
+CMD ["-networks", "/home/nonroot/icalm/networks.csv", "-line-listen", "4226"]
+