When your app is crashed, out of resources, or misbehaving in some other way, Heroku serves an error page, which can be customized for each application.| devcenter.heroku.com
There are different parts to a dyno’s [lifecycle](dyno-lifecycle). This article describes a dyno’s startup behavior.| devcenter.heroku.com
Heroku's release model allows applications to record and roll back to previous versions.| devcenter.heroku.com
Heroku add-ons are components, services, or pieces of infrastructure that are fully maintained by a third-party provider or by Heroku.| devcenter.heroku.com
Heroku Exec is a feature for creating secure TCP and SSH tunnels into a dyno. It supports SSH sessions, port forwarding, remote debugging, and inspection with popular Java diagnostic tools.| 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
The Heroku Platform uses the PHP buildpack to handle deployed PHP applications. The following shows Heroku’s behavior towards PHP apps and how it recognizes, runs, and builds them.| devcenter.heroku.com
Heroku Container Registry allows you to deploy your Docker-based app to Heroku. Both Common Runtime and Private Spaces are supported.| devcenter.heroku.com
This article explains how to use the Heroku Local CLI plugin.| devcenter.heroku.com
Heroku PGBackups allows you to capture backups of your databases using logical backup techniques.| devcenter.heroku.com