Add a github actions docker build

.github/workflows/docker.yaml

@@ -0,0 +1,36 @@
+name: Publish Docker image
+on:
+  push:
+    tags:
+      - "v*"
+    branches:
+      - "*"
+
+jobs:
+  docker:
+    name: Build Docker image and push to ghcr.io
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: docker/setup-buildx-action@v2
+      - uses: docker/metadata-action@v4
+        id: meta
+        with:
+          images: |
+            ghcr.io/${{ github.repository }}
+          tags: |
+            type=semver,pattern={{version}}
+            type=sha,prefix={{branch}}-,enable=${{ github.ref_type != 'tag' && !contains(github.ref_name, '/') }}
+      - uses: docker/login-action@v2
+        name: Login to ghcr.io
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - uses: docker/build-push-action@v4
+        name: Build and push image
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}