Add 404 check to CI

[maehr]

Describe what feature you'd like. Pseudo-code, mockups, or screenshots of similar solutions are encouraged!

We could add something like to check for 404 before merging.

    - name: Install required dependencies
      run: |
        sudo apt-get update
        sudo apt-get install -y wget

    - name: Start Quarto preview server
      run: |
        nohup quarto preview --port 5528 &
        sleep 5  # Give the server time to start

    - name: Check for 404 errors
      run: |
        wget --spider --recursive http://localhost:5528/ -o wget-log.txt || true
        if grep "404 Not Found" wget-log.txt; then
          echo "404 errors found in the following URLs:"
          grep "404 Not Found" wget-log.txt -B 1
          exit 1
        else
          echo "No 404 errors found."
        fi

What type of pull request would this be?

Enhancement

Any links to similar examples or other references we should review?

No response