Added topic intro tabs and information for servers

[Psydwinder]

Hey @ivanmauricio, just hold fire on merging this in at the moment, as i've only just added in the Server Week topic intro. I am in the process of adding in the one fro Databases and then I will get started on the one for programming paradigms.

[ivan-unfolds]

nice, thankfully that was easy! thanks for doing this @Psydwinder 🤓