Create a staging environment that is as similar to production as possible, by creating a second Heroku application that hosts your staging application.| devcenter.heroku.com
app.json is a manifest format for describing web apps. It declares environment variables, add-ons, and other information required to deploy and run an app on Heroku.| devcenter.heroku.com
A pipeline is a group of Heroku apps that share the same codebase.| devcenter.heroku.com
Heroku Review Apps run the code in any GitHub pull request in a complete, disposable Heroku app. Review Apps each have a unique URL you can share, making them a great way to propose, test, and merge changes to your| devcenter.heroku.com
The Eco dynos plan provides 1000 dyno hours for $5 per month. This article describes how this dyno hours pool works.| devcenter.heroku.com