Dunno - AppImage have a quick tutorial ?

Hi there, i want to create an AppImage from Source of the projects
DOSBox-X
m64p-netplay-server

Trying to read the documentation in :
https://docs.appimage.org/packaging-guide/converting-binary-packages/pkg2appimage.html

Looks like just works with debs packages

And trying to read this another doc :
https://docs.appimage.org/packaging-guide/from-source/native-binaries.html

I don't understand this example :
```
# get the source code
> git clone https://github.com/linuxdeploy/QtQuickApp.git
> cd QtQuickApp

# create out-of-source build dir and run qmake to prepare the Makefile
> mkdir build
> cd build
> qmake ..

# build the application on all CPU cores
> make -j$(nproc)

# use make install to prepare the AppDir
> make install INSTALL_ROOT=AppDir
```

In which moment the AppDir was created ? i specify this example because m64p-netplay-server must be compile against to qmake (qt5.8)

I just need a very specific instructions for example
1 - Download
2 - Create this Directory Structure
3 - Create this basefile.yml
4 - Use the tool (1) this way
5 - change the permissions & Test the generated AppImage.