Add pnpm config to github workflow runner

.github/workflows/run-tests.yml

@@ -2,7 +2,7 @@
 # For now we only run against node 22.x, but can easily add more node versions should we decide to support them.
 # For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-nodejs
 
-name: Node.js CI
+name: Node.js + pnpm CI
 
 on:
   push:
@@ -20,15 +20,26 @@ jobs:
         node-version: [22.x]
 
     steps:
+      - name: Checkout
       - uses: actions/checkout@v4
+
+      - uses: pnpm/action-setup@v4
+        name: Install pnpm
+        with:
+          version: 8
+          run_install: true
+
       - name: Use Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v3
         with:
           node-version: ${{ matrix.node-version }}
-          cache: 'npm'
-      - name: Install frontend dependencies
-        run: npm ci
-      - name: Lint frontend
-        run: npm run check-prettier
+          cache: 'pnpm'
+
+      - name: Lint
+        run: pnpm run check-prettier
+
       - name: Check that the application can successfully build
-        run: npm run build
+        run: pnpm run build
+
+      - name: Test
+        run: pnpm --filter api test