Docker - O Que É, Para Que Serve e Conceitos Iniciais

Docker is a solution to the problem of code running on a developer's machine but breaking on production servers due to differences in versions, libraries, and system configurations. It packages an application with its dependencies and runs it in isolated containers that are portable across different environments. This is different from virtual machines, which virtualize the entire hardware and are much heavier and slower. Containers are much lighter and faster, making them a more efficient solution for development and deployment.