Docker containers are launched using Docker images, which are built from layers of Dockerfiles. A Dockerfile is a text document that contains all the commands or instructions to create, copy, and run an image. Let’s look at what goes into creating a Dockerfile, which could be used to build a runnable Docker image.

Quality is now considered everyone's responsibility, and many developers are acquiring testing skills to validate their code before it gets to dedicated quality engineers. But where should you start? Consider beginning with unit tests that help you write better code, then building to integration tests and E2E testing.

Some defects require a fix, without a doubt. But not all defects are created equal, so careful thought should be applied before a defect is fixed. The goal isn’t to fix every reported defect; it’s to return value to the customer and profit to the company. These eight questions can help in the decision-making process.