[Improvement]: Documentation + Tutorial

[kaurov]

Improvement description

Please add to read.me:

1. installation commands variants, e.g. if user need to install not the latest version but v.10.3.4

2. Installation Troubleshooting FAQ.
   e.g. what to do if /admin/ is not found or images not displayed, or installation error like:
   [ERROR] The following prerequisites failed
   It is recommended to install UTF-8 locale, otherwise all CLI calls which use escapeshellarg() will strip multibyte characters (see https://packages.debian.org/en/stable/locales-all)

3. Links to tutorials on Pimcore website, at least paid ones.
   e.g. 'How to create SAAS using Pimcore', or 'MVP for StartUp using Pimcore in 1 Day' or 'Prepage Pimcore application for Production deployment'

Thanks.

[github-actions]

Thanks a lot for reporting the issue. We did not consider the issue as "Pimcore:Priority", "Pimcore:ToDo" or "Pimcore:Backlog", so we're not going to work on that anytime soon. Please create a pull request to fix the issue if this is a bug report. We'll then review it as quickly as possible. If you're interested in contributing a feature, please contact us first here before creating a pull request. We'll then decide whether we'd accept it or not. Thanks for your understanding.