[feat] publish Docker image to ghcr (#8)

* add Dockerfile

* add action for deployment

Author: vpchung

.github/workflows/deploy-image.yml

@@ -0,0 +1,42 @@
+name: Create and publish cnb-tools Docker image upon release
+on:
+  release:
+    types:
+      - 'published'
+  workflow_dispatch:  # for testing
+    
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build-and-push-image:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      
+      - name: Log in to the Container registry
+        uses: docker/login-action@v3.0.0
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v5.3.0
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+    
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v5.1.0
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          # labels: ${{ steps.meta.outputs.labels }}

Dockerfile

@@ -0,0 +1,9 @@
+FROM python:3.12-alpine 
+
+WORKDIR /root/cnb-tools
+
+COPY ./ ./
+RUN pip install --upgrade pip && \
+    pip install .
+
+ENTRYPOINT [ "cnb-tools" ]