We need to compile first :).

.github/workflows/check-doc-links.yml

@@ -6,6 +6,29 @@ jobs:
     name: Checking for dead links
     steps:
     - uses: actions/checkout@v2
+
+    - name: Setup Node 14.x
+      uses: actions/setup-node@v1
+      with:
+        node-version: 14.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 # use this to check for `cache-hit` (`steps.yarn-cache.outputs.cache-hit != 'true'`)
+      with:
+        path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
+        key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-yarn-
+    - name: Install dependencies
+      run: yarn --frozen-lockfile
+
+    - name: Build
+      run: yarn site:build
+
     - name: check-html-links-action step
       id: check-links
       uses: modernweb-dev/check-html-links-action@v1.1