Needed updates because of changed build system

[yakob-aleksandrovich]

In source/conf.py, add the following stanza

import os

# Define the canonical URL if you are using a custom domain on Read the Docs
html_baseurl = os.environ.get("READTHEDOCS_CANONICAL_URL", "")

# Tell Jinja2 templates the build is running on Read the Docs
if os.environ.get("READTHEDOCS", "") == "True":
    if "html_context" not in globals():
        html_context = {}
    html_context["READTHEDOCS"] = True

For more information, see here: https://about.readthedocs.com/blog/2024/07/addons-by-default/

The proposed change fixes the Custom Domain, which is no longer picked up by the hosted Builder.