readme update

README.md

@@ -1,25 +1,21 @@
-Collapsible Stateful Sidebar
-============================
+# Collapsible Stateful Sidebar
 
 [![Run RuboCop](https://github.com/AlphaNodes/redmine_collapsible_sidebar/workflows/Run%20Linters/badge.svg)](https://github.com/AlphaNodes/redmine_collapsible_sidebar/actions/workflows/linters.yml)
 
-Features
---------
+## Features
 
 - collapsable sidebar
 - Using local storage to remember status of the sidebar for each page
 
 Solution is based on <https://www.redmine.org/issues/21808#note-27>. If this is part of Redmine, this plugin will be deprecated.
 
-Requirements
-------------
+## Requirements
 
 - Redmine version >= 5.0
 - Redmine Plugin: [additionals](https://github.com/alphanodes/additionals) - used for FontAwesome support
-- Ruby version >= 2.7
+- Ruby version >= 3.0
 
-Installation
-------------
+## Installation
 
 ```shell
 cd $REDMINE_ROOT
@@ -31,8 +27,7 @@ bundle install
 
 Restart your application server after installation.
 
-Uninstall
----------
+## Uninstall
 
 Uninstall `redmine_collapsible_sidebar` plugin.
 
@@ -43,7 +38,22 @@ rm -rf plugins/redmine_collapsible_sidebar public/plugin_assets/redmine_collapsi
 
 Restart Redmine (application server)
 
-License
--------
+## License
 
-SEE [LICENSE](LICENSE)
+This plugin is licensed under the terms of GNU/GPL v2.
+See [LICENSE](LICENSE) for details.
+
+## Redmine Copyright
+
+The redmine_collapsible_sidebar is a plugin extension for Redmine Project Management Software, whose Copyright follows.
+Copyright (C) 2006-  Jean-Philippe Lang
+
+Redmine is a flexible project management web application written using Ruby on Rails framework.
+More details can be found in the doc directory or on the official website <http://www.redmine.org>
+
+This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.