Documentation overhaul

docs/features/overview.md

@@ -0,0 +1,19 @@
+# Overview
+
+**Alliance Auth** (AA) is a web application that helps Eve Online organizations efficiently manage access to external services and web apps.
+
+It has the following key features:
+
+- Automatically grants or revokes users access to external services (e.g. Discord, Mumble) and web apps (e.g. SRP requests) based on the user's current membership to [in-game organizations](/features/core/states) and [groups](/features/core/groups)
+
+- Provides a central web site where users can directly access web apps (e.g. SRP requests) and manage their access to external services and groups.
+
+- Includes a set of connectors (called ["services"](/features/services/index)) for integrating access management with many popular external services like Discord, Mumble, Teamspeak 3, SMF and others
+
+- Includes a set of web [apps](/features/apps/index) which add many useful functions, e.g.: fleet schedule, timer board, SRP request management, fleet activity tracker
+
+- Can be easily extended with additional services and apps. Many are provided by the [community](/features/community/index).
+
+Here is an example how the main page of the web site looks:
+
+![dashboard](/_static/images/features/core/dashboard/dashboard.png)