What is docker used for and how integration happened to cicd before docker

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Docker is used for containerization of applications, allowing for easy deployment and scaling. Before Docker, CI/CD integration was more complex and less efficient.

Docker is used to create lightweight, portable, self-sufficient containers that can run applications in any environment.
Before Docker, CI/CD pipelines often relied on virtual machines or manual configurations for deployment and testing.
Docker simplifies the process of packaging applications and their dependencies, making it easier to build, ship, and run software.
Integration of Docker in CI/CD pipelines streamlines the deployment process, improves consistency, and enables faster delivery of software updates.
Tools like Jenkins, GitLab CI/CD, and Travis CI can be used to automate the build, test, and deployment of Docker containers in CI/CD pipelines.

What is docker used for and how integration happened to cicd before docker

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