Add tests CI step

.github/workflows/tests.yml

@@ -0,0 +1,18 @@
+name: TESTS
+
+on:
+  push
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v2
+
+    - name: Set up Docker
+      uses: docker/setup-buildx-action@v1
+
+    - name: Build and run tests
+      run: make run_tests