Add automated testing infrastructure

Goal is to have tests run as part of PRs so we can have more confidence in our changes.

.github/workflows/verify-build-publish.yml

@@ -0,0 +1,24 @@
+name: Verify/Build/Deploy
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+
+jobs:
+  job:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Use Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version-file: ".nvmrc"
+
+      - name: Install
+        run: npm install
+
+      - name: test
+        run: npm run test

.nvmrc

@@ -0,0 +1 @@
+20