Setup docker in ci

.github/workflows/tests.yml

@@ -13,6 +13,14 @@ jobs:
     steps:
     - name: Checkout code
       uses: actions/checkout@v2
+    - uses: docker-practice/actions-setup-docker@master
+      timeout-minutes: 12
+    - run: |
+        set -x
+
+        docker version
+
+        docker run --rm hello-world
     - name: Run tests
       run: |
         sudo apt-get update && sudo apt-get install -y make