Add basic static code metrics (#396)

.github/workflows/ci.yml

@@ -9,6 +9,20 @@ on:
     branches:
       - master
 jobs:
+  codemetrics:
+    runs-on: ubuntu-latest
+    name: "Log Code Metrics"
+    if: github.ref == 'refs/heads/master'
+    steps:
+      - uses: actions/checkout@v2
+      - name: Use Node.js 12.x
+        uses: actions/setup-node@v1
+        with:
+          node-version: 12.x
+      - run: npm ci
+      - run: node utils/codeMetrics.js
+        env:
+          CODE_METRICS_APP_ID: ${{ secrets.CODE_METRICS_APP_ID }}
   compile:
     runs-on: ubuntu-latest
     name: "Compile TypeScript"