Hectopress is a WordPress starter project using Composer. Clone this repository locally and then create a .env file with the following contents, inserting license key information if using ACF Pro and/or Gravity Forms:
PLUGIN_ACF_KEY=[Insert ACF Pro dev key]
PLUGIN_GRAVITY=[Insert Gravity forms key]
After this, run composer install to install WordPress and the specified plugins to ./build. You'll also get a copy our Hectopress Theme as part of the process which is based on Underscores and ready for you to build a custom theme from.