add workflow

Author: jorendumoulin

.github/workflows/build-docker.yml

@@ -0,0 +1,40 @@
+# Build Docker image and publish to GHCR.
+name: build-docker
+on:
+  push:
+    branches: [main]
+  pull_request:
+    paths:
+      - 'Dockerfile'
+  workflow_dispatch:
+  release:
+    types: [published]
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: kuleuven-micas/snax
+jobs:
+  build-docker:
+    name: Deploy Docker image
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v2
+      - uses: docker/setup-buildx-action@v3
+      - name: GHCR Log-in
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+      - name: Build and push
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          file: Dockerfile
+          push: true
+          labels: ${{ steps.meta.outputs.labels }}
+          tags: ${{ steps.meta.outputs.tags }}