ci: added building of docker images

Author: jankovicgd

.github/workflows/main.yml

@@ -48,3 +48,33 @@ jobs:
         run: poetry run mypy .
       - name: Run tests
         run: poetry run pytest -v --cov=src
+  build-and-publish:
+    runs-on: ubuntu-24.04
+    needs: test  # Ensures tests pass before publishing
+    if: github.event_name != 'pull_request'
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Log in to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Set image tag
+        id: vars
+        run: echo "tag=ghcr.io/${{ github.repository }}:${{ github.sha }}" >> $GITHUB_OUTPUT
+
+      - name: Build and tag Docker image
+        run: docker build -t ${{ steps.vars.outputs.tag }} .
+
+      - name: Push Docker image
+        run: docker push ${{ steps.vars.outputs.tag }}
+
+      - name: Tag and push latest (on main only)
+        if: github.ref == 'refs/heads/main'
+        run: |
+          docker tag ${{ steps.vars.outputs.tag }} ghcr.io/${{ github.repository }}:latest
+          docker push ghcr.io/${{ github.repository }}:latest