How to add a new signpost

1. Add a photo of the signpost to serve as the title picture (see how to add a photo).
2. Create a yml file for the signpost:
   • Copy template_signpost.yml and adapt it.
   • Save the file as {SIGNPOST_ID}.yml inside add_new_content/add_new_signpost/signpost_yml_files.
3. Run the script update_website_with_new_content.py or notebook update_website_with_new_content.ipynb to update the website with the new content.