This challenge provides the basic framework for creating web-challenges that run as a PHP server.
In addition the the challenge description in problem.json, challenge authors
need to provide the php application and supporting resources with the
challenge directory as the root.
There are two values that cmgr will template into every file that ends in
.php, .txt, or .html: {{flag}} and {{seed}}. These values are
provided to minimize the need for boilerplate code that challenge authors
need. If there is a need for random values beyond the flag, challenge authors
should ensure they use {{seed}} as the initial seed for any PHP
randomization library they use in order to ensure reproducible builds.
If the challenge requires any additional packages, the corresponding apt
packages can be listed with one per line in packages.txt and they will be
installed before the application is launched.