Product Availability module for Magento 2
Manually
To install this module copy the code from this repo to app/code/Space48/ProductAvailability folder of your Magento 2 instance, then you need to run php bin/magento setup:upgrade
Via composer:
From the terminal execute the following:
composer config repositories.space48-product-availability vcs git@github.com:Space48/ProductAvailability.git
then
composer require "space48/productavailability:{release-version}"
Once installed, go to the Admin Panel -> Stores -> Configuration -> Space48 -> Product Availability and enable the extension.