Website for the Libre Graphics Meeting 2021

Notes to the webmain:

• Please do not put original assets (that are not directly used for the website) in public/.
  Create an assets/ directory or ask for a htdocs-2021-assets repository.
• Please do not put the vendor directory in this repository.
  We can run composer install on the server whenever it's neeeded.
• Put the stuff that should be reached by http in the public directory.
  Keep all Php code that should not be directly reached in private/.
  If you have Php scripts in public/, they can be load the libraries from ../../php-include/2021/.