0a712b9fce
* + add header into Packet Mixing docs
* + add head changes for testing
* / updated version of metatags in theme.config
* + add env file
* / theme.config to use NEXT_PUBLIC_SITE_URL from env file
* @ Fix broken link in theme.config
* - remove favicon code
* + add desription for intro pages
* + add default book's desriptions
* Revert "+ add desription for intro pages"
This reverts commit 98c78242d4.