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.

With so many options for cloud computing platforms, it can be tough to narrow them down. Focus on the most important features for your work: Do you want a server-based platform or serverless? What support do you need for your OS and software? What other services do you want integrated? These are the questions to ask.