Updated some Doku

Folks, Just updated: * our Docs landing page * pur Installation overview * our local interactive Installation guide * our Virtualization overview * our Virtualization installation guide („Add Virtualization“). I added some minor information to the installation guide and to the Add Virtualization guide. It’s all minor, so I already published everything to our main docs. While making updated screenshots I noticed a problem with Anaconda. Until F37 you could use <shift>+<print> in any screen and Anaconda made a screenshot in /root/anaconda-screenshots/ (/tmp/anaconda-screenshots). With F40 I couldn’t make a screenshot anymore. Does get someone this issue, too? Without that feature it’s a mess to produce documentation. Best Peter -- Peter Boy https://fedoraproject.org/wiki/User:Pboy PBoy(a)fedoraproject.org Timezone: CET (UTC+1) / CEST (UTC+2) Fedora Server Edition Working Group member Fedora Docs team contributor and board member Java developer and enthusiast