Add BigCommerce links to providers section (vercel#1046)

README.md

@@ -24,6 +24,7 @@ Vercel will only be actively maintaining a Shopify version [as outlined in our v
 Vercel is more than happy to partner and work with any commerce provider to help them get a similar template up and running and listed below. Alternative providers should be able to fork this repository and swap out the `lib/shopify` file with their own implementation while leaving the rest of the template mostly unchanged.
 
 - Shopify (this repository)
+- [BigCommerce](https://github.com/bigcommerce/nextjs-commerce) ([Demo](https://next-commerce-v2.vercel.app/))
 - [Medusa](https://github.com/medusajs/vercel-commerce) ([Demo](https://medusa-nextjs-commerce.vercel.app/))
 - [Saleor](https://github.com/saleor/nextjs-commerce) ([Demo](https://saleor-commerce.vercel.app/))