Check for broken site links

During CI, a light web server is setup:
https://docs.python.org/3/library/http.server.html#command-line-interface
The the site is crawled to find broken links:
https://linkchecker.github.io/linkchecker/man/linkchecker.html
At the moment it just reports broken links in CI output.

Author: bkmgit

.github/workflows/deploy.yml

@@ -16,7 +16,7 @@ jobs:
       run: |
        zypper refresh
        zypper --non-interactive update
-       zypper --non-interactive install git libxslt lowdown make sblg nodejs npm
+       zypper --non-interactive install git libxslt linkchecker lowdown make python3 sblg nodejs npm
     - uses: actions/checkout@v6
       with:
         submodules: recursive
@@ -30,6 +30,11 @@ jobs:
       run: |
        mkdir site
        make install PREFIX=$(pwd)/site
+    - name: check for broken links
+      run: |
+        python3 -m http.server -d site 8000 > server.log &
+        sleep 10
+        linkchecker -o Failures --check-extern http://0.0.0.0:8000/ || true
     - name: Upload artifact
       uses: actions/upload-pages-artifact@v4
       with: