Quickly spin up a heroku site to allow someone to pay a fixed amount for a single product.
Use the Deploy to Heroku button above to create a copy of the app.
Install composer.
$ composer install
$ env SECRET_KEY=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX PUBLISHABLE_KEY=pk_XXXXXXXXXXXXXXXXXXXXXXXXXXXXX COMPANY_NAME='Your Company' PRODUCT_NAME='Product Name' AMOUNT=100.00 php -S localhost:8000