ci: cache .next/cache (#318)

follow
https://nextjs.org/docs/pages/guides/ci-build-caching#github-actions for
hopefully faster builds

Author: mnahkies

.github/workflows/ci.yml

@@ -1,6 +1,3 @@
-# This workflow will do a clean install of node dependencies, build the source code and run tests across different versions of node
-# For more information see: https://help.github.com/actions/language-and-framework-guides/using-nodejs-with-github-actions
-
 name: Node.js CI
 
 on:
@@ -18,34 +15,40 @@ jobs:
     strategy:
       matrix:
         node-version: [20.x, 22.x]
-        # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           fetch-depth: 0
 
       - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           registry-url: "https://registry.npmjs.org"
           node-version: ${{ matrix.node-version }}
 
-      - uses: actions/cache@v4
+      - uses: actions/cache@d4323d4df104b026a6aa633fdb11d772146be0bf # v4.2.2
         id: yarn-cache
         with:
           path: .yarn
           key: ${{ runner.os }}-yarn-${{ hashFiles('yarn.lock') }}
           restore-keys: |
             ${{ runner.os }}-yarn-
 
+      - uses: actions/cache@d4323d4df104b026a6aa633fdb11d772146be0bf # v4.2.2
+        id: nextjs-cache
+        with:
+          path: packages/documentation/.next/cache
+          key: ${{ runner.os }}-nextjs-${{ hashFiles('yarn.lock') }}-${{ hashFiles('**/*.js', '**/*.jsx', '**/*.ts', '**/*.tsx') }}
+          restore-keys: |
+            ${{ runner.os }}-nextjs-${{ hashFiles('yarn.lock') }}-
+
       - run: corepack enable
+
       - run: yarn --immutable
 
       - run: yarn ci-build
-
       - run: yarn ci-test
-
       - run: yarn ci-lint
 
       - run: yarn integration:generate