Optimizing deployments
The simplest of the Heroku applications run in at least two different environments—your local development environment and the Heroku remote environment.
A given production application could have many developers working on it. You can have several developers interacting with the same production application when they want to push their local changes to it. Addtionally, developers may have additional code branches to test their applications or verify nonfunctional requirements such as performance.
All things work reasonably well as long as there is concurrency between the various environments you use, that is, similar configuration and common source code resulting in same functional behavior. However, in the real world, things ...
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