ci: add docker build workflow

.github/workflows/ghcr.yaml

@@ -0,0 +1,28 @@
+name: Build a Docker image and publish it to GHCR
+
+on:
+  push:
+    tags:
+    - '*'
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v3
+        with:
+          context: .
+          push: true
+          tags: ghcr.io/${{ github.repository }}:${{ github.ref_name }}