In the main folder we can see these folders and files.
assets/ lib/ log/ tmp/ src/ themes/ index.php config.php
assets/ A public folder where we upload our media files.
lib/ A public folder. Third-party libraries are inside this folder.
log/ A private folder that save logs and the user sessions.
tmp/ A public folder with temporally files created.
src/ The folder of installed packages. Here is all the code of the system.
themes/ The folder of installed themes.
index.php The main index file. For any call, execution starts from here.
config.php The configuration file. It is generated after installation.