DOC: Update readme with Qt dependencies

README.md

@@ -9,11 +9,19 @@ A Karaoke player made to replace the old bash scripts on Sakura.
 
 ## Table of content
 
-- [Building instructions](#building-the-player)
-- [Preparing karaokes for lektor](#preparing-a-kara-for-lektor)
+- [lektor mk7](#lektor-mk7)
+  - [Table of content](#table-of-content)
+  - [Building the player](#building-the-player)
+    - [Prerequisites](#prerequisites)
+    - [Building instructions](#building-instructions)
+  - [Preparing a kara for lektor](#preparing-a-kara-for-lektor)
   - [How to use lektor](#how-to-use-lektor)
+    - [Launch instructions](#launch-instructions)
+    - [How to update the lektord database](#how-to-update-the-lektord-database)
+    - [How to send commands to lektor](#how-to-send-commands-to-lektor)
+    - [How to configure lektor](#how-to-configure-lektor)
   - [Contributing](#contributing)
-- [MPD compatibility](#mpd)
+  - [MPD](#mpd)
 
 ## Building the player
 
@@ -28,12 +36,16 @@ A Karaoke player made to replace the old bash scripts on Sakura.
   3.31.0 or newer for [generated columns](https://www.sqlite.org/gencol.html) support
 - a POSIX.1-2008 compatible system (for MS Windows, use something like WSL2)
 
-For the module sdl2, you will need the folowing prerequisites:
+For the module sdl2, you will need the following prerequisites:
 
 - the [mpv](https://mpv.io/) development library
 - the [sdl2](https://www.libsdl.org/) development library
 - the [sdl2-image](https://www.libsdl.org/projects/SDL_image/) development library
 
+For the Qt module, you will need the following prerequisites:
+
+- the [qt] develipment library, QtCore, QtWidgets in at least version 5.15
+
 For the module repo, you will need the folowing prerequisites:
 
 - the [libcurl](https://github.com/curl/curl) developmemt library