Add documentation for Windows Docker Executor

What does this MR do?

Add documentation for Windows Docker Executor

Why was this MR needed?

&535 (closed)

Are there points in the code the reviewer needs to double check?

Does this MR meet the acceptance criteria?

• Documentation created/updated
• Added tests for this feature/bug
• In case of conflicts with master - branch was rebased

What are the relevant issue numbers?

&535 (closed)