Cache node_modules

Author: Sainan

.github/workflows/build.yml

@@ -9,7 +9,15 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout
-        uses: actions/checkout@main
+        uses: actions/checkout@v4
+
+      - name: Cache node modules
+        uses: actions/cache@v4
+        with:
+          path: node_modules
+          key: node_modules-${{ hashFiles('**/package-lock.json') }}
+          restore-keys: |
+            node_modules-
 
       - run: npm ci