Add linkchecker config (#1189)

* add a linkchecker config file to supress HTTP redirect warnings

* added linkchecker config to CI

Author: hotzenklotz

.github/workflows/ci.yml

@@ -325,7 +325,7 @@ jobs:
           SLACK_HOOK: ${{ secrets.LINK_CHECKER_SLACK_HOOK }}
         run: |
           cd docs
-          poetry run linkchecker https://docs.webknossos.org > link_status || \
+          poetry run linkchecker --config linkcheckerrc https://docs.webknossos.org > link_status || \
             curl -X POST --data-urlencode "payload={\"text\": \":warning: Broken Links on doc.webknossos.org :warning:\n"'```'"\n$(cat link_status)\n"'```"}' \
               "$SLACK_HOOK"
 

.github/workflows/publish_docs.yml

@@ -45,6 +45,6 @@ jobs:
         SLACK_HOOK: ${{ secrets.LINK_CHECKER_SLACK_HOOK }}
       run: |
         cd docs
-        poetry run linkchecker https://docs.webknossos.org > link_status || \
+        poetry run linkchecker --config linkcheckerrc https://docs.webknossos.org > link_status || \
           curl -X POST --data-urlencode "payload={\"text\": \":warning: Broken Links on doc.webknossos.org :warning:\n"'```'"\n$(cat link_status)\n"'```"}' \
             "$SLACK_HOOK"

docs/linkcheckerrc

@@ -0,0 +1,2 @@
+[filtering]
+ignorewarnings=http-redirected