Here is the sourcecode of the official site.
Check out the infos page for technical details.
Use caution.
The "LISENCE" file is the lisence for the sourcecode, not the resources.
Resources, like text, pictures, videos are copyrighted by various people in TPC3.
You might also want to check licenses of the frameworks like material-ui, gatsby, react and starter(gatsby-default-starter, license: LICENSE.gatsby). Checking these resourcies is your responsibility.