Introducing the app.json Application Manifest

Developers want to spend less time setting up applications and start working with the code sooner. Setting up applications is error-prone, time consuming and interruptive to the development flow. Often, there are several steps to go from your code or other samples and templates that you find in repositories online, to a running application that you can continue to work on.

Today, we are excited to introduce the app.json manifest. app.json enables developers to define their applications' details, setup configurations and runtime environments in a structured way. Instead of providing step-by-step instructions, you can now add app.json files to your applications' source code. You and other developers can then easily deploy the source code into fully configured apps on Heroku, ready for further development.

The new app-setups endpoint in the Heroku Platform API leverages app.json to make setting up of complex applications as simple as a single API call. app-setups orchestrates the different steps involved in getting an application deployed and running, freeing up developers everywhere to quickly start working on the code in a fully configured application environment.

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