add some build instructions

Author: ABBAPOH

README.md

@@ -6,3 +6,80 @@ website.
 
 The original examples from the website can be found
 [here](https://github.com/JoeyDeVries/LearnOpenGL/tree/master).
+
+## Building From Source
+
+### Install Qt
+
+You can install Qt from the online installer from the Qt [website](https://www.qt.io/download-dev).
+
+Alternatively, you can use the `install-qt.sh` script from the `scripts` directory.
+```
+$ ./scripts/install-qt.sh -d $HOME/Qt --version 6.7.0 --target desktop qtbase
+```
+This script requqres Bash-like Shell.
+
+#### Ubuntu / Debian
+
+```
+$ sudo apt install qt5-default
+```
+
+#### macOS
+Qt is available in [Brew](https://formulae.brew.sh/formula/qt)
+or [macports](https://ports.macports.org/port/qt6/).
+```
+$ brew install qt
+```
+or
+```
+$ sudo port install qt6
+```
+
+#### Windows
+
+Use the online installer from the Qt [website](https://www.qt.io/download-dev)
+
+### Install Qbs
+
+#### Ubuntu / Debian
+
+```
+$ sudo apt install qbs
+```
+
+#### macOS
+Qbs is available in [Brew](https://formulae.brew.sh/formula/qbs)
+or [macports](https://ports.macports.org/port/qbs/).
+```
+$ brew install qbs
+```
+or
+```
+$ sudo port install qbs
+```
+
+#### Windows
+Qbs is available in [Chocolatey](https://community.chocolatey.org/packages/qbs#versionhistory)
+```
+$ choco install qbs
+```
+
+#### Configuring Qbs
+```
+$ qbs setup-toolchains --detect
+$ qbs setup-qt $(which qmake) qt
+$ qbs config defaultProfile qt
+```
+
+#### Buiding with Qbs
+From the source directory, run:
+```
+$ qbs resolve
+$ qbs build
+```
+
+#### Using IDE
+Or you can simply open the `project.qbs` file in QtCreator or the source directory in VScode.
+For VScode you might want to use the
+[Qbs plugin](https://marketplace.visualstudio.com/items?itemName=qbs-community.qbs-tools).