Update build.yaml

.github/workflows/build.yaml

@@ -13,6 +13,11 @@ jobs:
       uses: actions/setup-node@v4
       with:
         node-version: '20.x'
+    - uses: actions/cache@v3
+      id: npm-cache # use this to check for `cache-hit` ==> if: steps.npm-cache.outputs.cache-hit != 'true'
+      with:
+        path: ~/.npm
+        key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
     - name: Install dependencies
       run: npm install
     - run: npm test