The source-code of this website is included in the Lepton Theme module source-code package.
To download this website source-code, you can use the ABP CLI or ABP Suite.
Run the following ABP CLI command in the command prompt :
abp get-source Volo.LeptonTheme
or You can simply open the ABP Suite and navigate to the Modules page.
There you can find the Lepton Theme source-code download button.
After downloading and extracting, you can find the related source-code is in the "demo" folder.