[Developer-portal] Fedora Developer Portal Staging Update

[Jarek Prokop]

Hello,

overdue update is coming to staging.

Most notable changes:
   * Introduce Lua installation [0]
   * Python FastAPI installation [1]
   * Configuring RubyGems through .gemrc [2]
   * Document usage of qemu sessions in Vagrant [3]
   * Long overdue update of IRC links to point to Libera [4]

[0] 
https://developer.stg.fedoraproject.org/tech/languages/lua/lua_installati...
[1] 
https://developer.stg.fedoraproject.org/tech/languages/python/fastapi-ins...
[2] 
https://developer.stg.fedoraproject.org/tech/languages/ruby/gems-installa...
[3] 
https://developer.stg.fedoraproject.org/tools/vagrant/vagrant-libvirt.html

[4] 
https://developer.stg.fedoraproject.org/deployment/secondary_architecture...
[4] 
https://developer.stg.fedoraproject.org/deployment/secondary_architecture...
[4] 
https://developer.stg.fedoraproject.org/tech/languages/python/python-sig....

Regards,
Jarek Prokop