update readme (add docker support)

Author: Unsigned-Long

docs/details/build_ikalibr_docker.md

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     <a href="https://github.com/Unsigned-Long"><strong>Author » Shuolong Chen</strong></a>
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 This tutorial will guide you through the process of using the `iKalibr` project in a Docker environment, including building and compiling it. Please follow the steps below.
 
 ## Steps