Can you explain what Selenoid is and what its main purpose is?

Selenoid is a modern tool for running browsers in Docker containers, used for automated testing of web applications. Its main purpose is to provide parallel and isolated execution of multiple browser sessions without the need to install full browsers on the testing machine.

Advantages of Selenoid:

• Fast browser startup in containers
• Easy test scaling
• Support for popular browsers (Chrome, Firefox, Opera, etc.)
• Convenient session management via REST API

Example of use: instead of launching a local browser, tests are directed to Selenoid, which runs the required browser in a container and returns control to the test.