Add lock file and set up build and test action

.github/workflows/node.js.yml

@@ -0,0 +1,27 @@
+name: Node.js CI
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [18.x]
+        # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v3
+      with:
+        node-version: ${{ matrix.node-version }}
+        cache: 'npm'
+    - run: yarn install
+    - run: yarn test:ci

.yarnrc

@@ -1 +1,2 @@
---ignore-engines true
+--ignore-engines true
+registry "https://registry.yarnpkg.com"