yarn build cache

Author: DellaBitta

.github/workflows/nightly-js-sdk.yaml

@@ -45,6 +45,17 @@ jobs:
       run: echo "export const firebaseConfig = $PROJECT_CONFIG;" > src/lib/app_tests/firebase.ts
     - name: Yarn install
       run: yarn --frozen-lockfile
+    - name: Restore yarn build cache
+      uses: actions/cache@v4
+      with:      
+      path: |
+        ~/.npm
+        ${{ github.workspace }}/.next/cache
+      # Generate a new cache whenever packages or source files change.
+      key: ${{ runner.os }}-nextjs-${{ hashFiles('yarn.lock') }}-${{ hashFiles('**/*.js', '**/*.jsx', '**/*.ts', '**/*.tsx') }}
+      # If source files changed but packages didn't, rebuild from a prior cache.
+      restore-keys: |
+        ${{ runner.os }}-nextjs-${{ hashFiles('yarn.lock') }}-
     - name: Yarn build
       run: yarn build
     - name: Install Playwright browsers