CI: Add build workflow

Let's test if we can actually build the artifact

Author: tvdeyen

.github/workflows/build.yml

@@ -0,0 +1,28 @@
+name: Build
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+jobs:
+  Build:
+    runs-on: ubuntu-24.04
+    env:
+      NODE_ENV: production
+    steps:
+      - uses: actions/checkout@v4
+      - name: Restore node modules cache
+        uses: actions/cache@v4
+        with:
+          path: node_modules
+          key: ${{ runner.os }}-pnpm-${{ hashFiles('./package.json') }}
+          restore-keys: |
+            ${{ runner.os }}-pnpm-
+      - name: Install pnpm
+        uses: pnpm/action-setup@v4
+      - name: Install dependencies
+        run: pnpm install
+      - name: Build package
+        run: pnpm run build