pavanoltraining/OpencartV121 ? reverse-engineered prompt

Build me a small test automation project for an OpenCart site, with a few end to end browser tests for the main shopping flow, like logging in, searching for a product, adding it to cart, and checking out as far as possible without real payment. I want it to run from a simple command, save screenshots and test reports, and keep test data separate so it is easy to change later. It should also be able to run in more than one browser, and if possible work with a local Docker based browser grid or a remote browser testing service. Keep the setup simple and practical, with a clear way to run everything on my machine, and add whatever sample tests, config files, and sample data are needed so the project feels ready to use. If you need to look up current docs online, do that.