reuse containers to fix #86

pkg/runner/testdata/node/push.yml

@@ -0,0 +1,16 @@
+name: NodeJS Test
+
+on: push
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+        with:
+          node-version: 12
+          registry-url: https://registry.npmjs.org/
+
+      - name: Install Dependencies
+        run: npm install