devops(docker): add docker test bot (#357)

.github/workflows/test_docker.yml

@@ -0,0 +1,28 @@
+name: Test Docker
+on:
+  push:
+    paths:
+      - '.github/workflows/test_docker.yml'
+      - 'Dockerfile*'
+    branches:
+      - master
+      - release-*
+  pull_request:
+    paths:
+      - '.github/workflows/test_docker.yml'
+      - 'Dockerfile*'
+    branches:
+      - master
+      - release-*
+jobs:
+  test:
+    timeout-minutes: 60
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v2
+      - name: Build Docker image
+        run: docker build -t playwright-java:localbuild-focal -f Dockerfile.focal .
+      - name: Test
+        run: |
+          CONTAINER_ID="$(docker run --rm --ipc=host -v $(pwd):/root/playwright --name playwright-docker-test -d -t playwright-java:localbuild-focal /bin/bash)"
+          docker exec "${CONTAINER_ID}" /root/playwright/tools/test-local-installation/create_project_and_run_tests.sh