Install node_modules in build-docs.yml

.github/workflows/build-docs.yml

@@ -15,16 +15,26 @@ jobs:
       - uses: actions/setup-node@v1
         with:
           node-version: '12.x'
+
+      - name: Get yarn cache directory path
+        id: yarn-cache-dir-path
+        run: echo "::set-output name=dir::$(yarn cache dir)"
+      - 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: |
+            ${{ runner.os }}-yarn-
+      - name: Install modules
+        run: yarn install --frozen-lockfile
+      - name: Install modules (example/)
+        run: yarn example --frozen-lockfile
+
       - name: Test Build
         run: |
-          if [ -e yarn.lock ]; then
           yarn install --frozen-lockfile
-          elif [ -e package-lock.json ]; then
-          npm ci
-          else
-          npm i
-          fi
-          npm run build
+          yarn build
   gh-release:
     if: github.event_name != 'pull_request'
     runs-on: ubuntu-latest
@@ -46,6 +56,22 @@ jobs:
           HostName github.com
           IdentityFile ~/.ssh/id_rsa
           EOT
+
+      - name: Get yarn cache directory path
+        id: yarn-cache-dir-path
+        run: echo "::set-output name=dir::$(yarn cache dir)"
+      - 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 modules
+        run: yarn install --frozen-lockfile
+      - name: Install modules (example/)
+        run: yarn example --frozen-lockfile
+
       - name: Release to GitHub Pages
         env:
           USE_SSH: true