Introduction

As a software professional, you may be aware of different software development methodologies that are followed across the industry. Irrespective of the methodology being followed, there will be multiple environments, such as development, staging, and production, where the application life cycle needs to be followed, with these critical stages related to development:

1. Develop the application based on the requirements.
2. Build the application and fix any errors.
3. Deploy/release the package to an environment (development/staging/production).
4. Test against the requirements.
5. Promote the release to the next environment (from development to staging and staging to production).

   Note

   For the sake of simplicity, the initial stages, such as requirement gathering, planning, designing, and architecture, are excluded, just to emphasize the stages that are relevant to this chapter.

For each change made to the software, we need to build and deploy the application...