What is the main task and the advantages of using Docker in the process of developing and deploying applications?

Docker allows packaging an application together with all its dependencies into a container that can be run in any environment where Docker is installed. The main goal of Docker is to ensure consistency across development, testing, and production environments.

Advantages of using Docker:

• Portability: containers work the same on different machines and OS.
• Isolation: applications and their dependencies are isolated from each other.
• Fast startup: containers start faster than virtual machines.
• Simplified deployment: applications can be easily transferred and scaled.

Example: a developer creates a Docker image with the application and the required version of .NET, then this image can be run on a server without additional environment setup.