Add integration test for Docker image

Author: chrisns

.github/workflows/docker.yml

@@ -46,3 +46,28 @@ jobs:
           push: ${{ github.ref == 'refs/heads/master' }}
           tags: ${{ steps.docker_meta.outputs.tags }}
           labels: ${{ steps.docker_meta.outputs.labels }}
+
+      - name: build image for tests
+        uses: docker/build-push-action@263435318d21b8e681c14492fe198d362a7d2c83 # v6.18.0
+        with:
+          platforms: linux/amd64
+          load: true
+          tags: ${{ steps.docker_meta.outputs.tags }}
+
+      - name: run integration test
+        shell: bash
+        run: |
+          IMAGE=$(echo "${{ steps.docker_meta.outputs.tags }}" | head -n 1)
+          docker run -d --name sonos-test -p 5005:5005 "$IMAGE"
+          for i in {1..20}; do
+            if curl -fs http://localhost:5005/zones > /dev/null; then
+              success=true
+              break
+            fi
+            sleep 3
+          done
+          docker rm -f sonos-test
+          if [ "$success" != "true" ]; then
+            echo "Endpoint test failed" >&2
+            exit 1
+          fi