nabu-3 is built over linux and PHP-7.1. Dependencies are checked and required when you install each module using composer. The basic installation runs well over PHP-7.0, but if you plan to use some modules like nabu-3 QRCode, you need to run nabu-3 under PHP-7.1.
We recommend to run nabu-3 always over PHP-7.1.
To install nabu-3 in your computer, please run the command below in /opt folder:
composer create-project nabu-3/nabu-3 nabu-3