Create dummy-ci.yml

.github/workflows/dummy-ci.yml

@@ -0,0 +1,27 @@
+name: Node CI (dummy)
+
+on:
+  push:
+    branches:
+      - support/for-dummy-action
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [10.x, 12.x]
+
+    steps:
+    - uses: actions/checkout@v1
+      
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+        
+    - name: echo
+      run: |
+        echo node -v