Update wiki installation guide

[andreaskrath]

Description

Some of the recent changes have altered the installation process, and the guide should reflect this.

It would likely also be a good idea to include the process of updating the wiki documentation as part of solving an issue, if it requires this.

Possible Suggested Solution

• Update the wiki with new installation instructions.

Sub Tasks

• Somehow involve this process as a required part of a pull request being merged.

[KristianS93]

https://github.com/aau-giraf/wiki/pull/307