In the Version V1.14.0, the README is not up to date

[scaphilo]

Describe the bug

1. The Demos deployment not exist anymore. It is therefore recommended to remove this section from the readme
2. Development environment setup: The information is obsolete with the new version V1.14.0 it is possible to just use command docker-compose pull and docker compose up to download and run the application.
   The command to run the application is docker compose run --service-ports web python manage.py runserver 0.0.0.0:8000 --settings=projectsettings.settings.development_docker_sqlite_settings.py
3. The section about the release process and the update needs to be reviewed and updated as well so that it reflects the update from V1.12.0 to V1.14.0 update.
4. Instead of referring to pages from https://github.com/scaphilo/koalixcrm/ please create a structure in the documentation folder which includes the following chapter: Development. The chapter shall include following files: Installation.md, Development_Environment_Setup.md, Release_Process.md and Update.md

To Reproduce
Read the README.md on master branch

Expected behavior
Investigate, test and update the README.md, wiki/Update.md and wiki/ so that it reflects the current situation