use htmlproofer without external link check

.github/workflows/link-checker.yaml

@@ -25,20 +25,18 @@ jobs:
         with:
           hugo-version: '${{ steps.hugo-version.outputs.HUGO_VERSION }}'
 
-        # If you have a custom install step for themes beyond submodules, do it here
-        # For example, if your theme is not a submodule but you need to download it:
-        # - name: Install Theme
-        #   run: |
-        #     git clone https://github.com/username/your-hugo-theme.git themes/your-hugo-theme
-      - name: Install Requirements
-        run: |
-          pip install linkchecker
+      - name: Build site
+        run: hugo
 
-      - name: Start server
-        run: |
-          nohup hugo server --baseURL http://localhost:1313 --bind 0.0.0.0 --disableFastRender > hugo_server.log 2>&1 &
-          sleep 1
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.0'
 
-      - name: Check links
+      - name: Install dependencies
         run: |
-          linkchecker --check-extern -t 1 http://localhost:1313
+          echo "source 'https://rubygems.org'\ngem 'html-proofer'" > Gemfile
+          bundle install
+
+      - name: Run html-proofer
+        run: htmlproofer ./public --disable-external --no-enforce-https