What is a Container?
Standard unit of software that packages up code and all its dependencies so the application runs quickly and reliably from one computing environment to another. .
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.Container images become containers at runtime .
Containers isolate software from its environment and ensure that it works uniformly despite differences for instance between development and staging. .
What is Docker?
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. Using Docker, you can quickly deploy and scale applications into any environment and know your code will run.
Docker lets you ship code faster, standardize application operations, seamlessly move code, and save money by improving resource utilization. With Docker, you get a single object that can reliably run anywhere. Docker's simple and straightforward syntax gives full control.