Create build workflow

.github/workflows/main.yml

@@ -0,0 +1,44 @@
+name: Build
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Setup Node.js
+      uses: actions/setup-node@v3
+      with:
+        node-version: '18'
+
+    - name: Cache modules
+      uses: actions/cache@v4
+      with:
+        path: ~/.npm
+        key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
+        restore-keys: |
+          ${{ runner.os }}-node-
+
+    - name: Install dependencies
+      run: npm install
+
+    - name: Run tests
+      run: npm test
+
+    - name: Build
+      run: npm run build
+
+    - name: Build standalone
+      run: npm run make-standalone
+
+    - name: Archive production artifacts
+      uses: actions/upload-artifact@v3
+      with:
+        name: build
+        path: build/