Added node_modules cache

.github/workflows/code-style.yml

@@ -10,10 +10,22 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v2
 
+      - name: Get yarn cache directory path
+        id: yarn-cache-dir-path
+        run: echo "::set-output name=dir::$(yarn config get cacheFolder)"
+
+      - uses: actions/cache@v2
+        id: yarn-cache
+        with:
+          path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
+          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-yarn-
+
       - name: Install packages
         uses: borales/actions-yarn@v2.0.0
         with:
-          cmd: install
+          cmd: --frozen-lockfile
 
       - name: Run prettier
         uses: borales/actions-yarn@v2.0.0