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A Docker container image is a lightweight, standalone, executable package of software that includes everything needed to run an application: code, runtime, system tools, system libraries and settings.
Docker containers create isolated environments similar to VMs without running a full operating system, enhancing portability and convenience. Docker is easy to use and popular for launching applications quickly without impacting your system.
Docker is a set of Platforms as a service (PaaS) products that use Operating system-level virtualization to deliver software in packages called containers. Containers are isolated from one another and bundle their own software, libraries, and configuration files; they can communicate with each other through well-defined channels.
Docker is a tool for running your applications inside containers. Containers package all the dependencies and code your app needs to run into a single file, which will run the same way on any machine.
Simply put, containers are isolated processes for each of your app's components. Each component - the frontend React app, the Python API engine, and the database - runs in its own isolated environment, completely isolated from everything else on your machine. Here's what makes them awesome. Containers are: Self-contained.
Docker is simply a tool for creating and managing containers. At its core, Docker has two concepts that are useful to understand: the Dockerfile and Docker Images. A Dockerfile contains the set of instructions for building a Docker Image. A Docker Image serves as a template for creating Docker containers.
Docker is a software platform that allows you to build, test, and deploy applications quickly. Docker packages software into standardized units called containers that have everything the software needs to run including libraries, system tools, code, and runtime.
Docker's container-based platform allows for highly portable workloads. Docker containers can run on a developer's local laptop, on physical or virtual machines in a data center, on cloud providers, or in a mixture of environments.
Here's a brief explainer: The IT software "Docker” is containerization technology that enables the creation and use of Linux® containers. The open source Docker community works to improve these technologies to benefit all users.
Docker is an open-source platform that enables developers to build, deploy, run, update and manage containers. Containers are standardized, executable components that combine application source code with the operating system (OS) libraries and dependencies required to run that code in any environment.