documentation

Pull request #4638: Feature/DEV-4858 7.5 D s49

Merge in WEB/documentation from feature/DEV-4858-7.5-D-s49 to release/8.0

* commit 'd392924be00b1018ae240f006e74faed552e6101':
  [DEV-4858] updated description for Nginx (sub-issue 49)
  [DEV-4858] updated description (sub-issue 49)
  [DEV-4858] updated note (sub-issue 49)
  [DEV-4858] added instructions for Nginx and new OS versions (sub-issue 49)