Websites that have a shopping cart or checkout page, either using a known ecommerce platform or a custom solution.
Cowboy is a small, fast, modular HTTP server written in Erlang.
Font Awesome is a font and icon toolkit based on CSS and Less.
Google Analytics is a free web analytics service that tracks and reports website traffic.
Heroku is a cloud platform as a service (PaaS) supporting several programming languages.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Open Graph is a protocol that is used to integrate any web page into the social graph.
Ruby on Rails is a server-side web application framework written in Ruby under the MIT License.
A modest JavaScript framework for the HTML you already have.
WhatsApp Business is a free to download app available on Android and iPhone using which businesses can connect with their customers.