Better use of the config

[egekorkan]

Coming from #336 (comment)

Another note: Adding "WoT" prefix to each subpage would not be a good idea if this prefix changes once... we deal with it in _config.yml

[egekorkan]

This might fix the netlify problem or we need to adjust this in netlify to take /WoT into account

[egekorkan]

Call of 31.01:
We have this current config due to website being available at W3.org and at github.io. Now we have Netlify as well. In the case of Netlify, a postprocessing script can actually replace all w3.org URLs with the preview URLs.

[egekorkan]

Call of 21:03: Actually, even if the website is opened locally via jekyll, the links in the navbar change the 127.0.0.1 to localhost so there is a different behavior with respect to links in the config via jekyll vs links we add via href inside the code