Add "Lego set" back in README.md

This PR adds the nice concept of "Lego set" back in README.md.

Signed-off-by: Yong Tang <[email protected]>

Author: yongtang

README.md

@@ -5,7 +5,7 @@ The Moby Project
 
 Moby is an open-source project created by Docker to enable and accelerate software containerization.
 
-It provides a comprehensive toolkit of components, the framework for assembling them into custom container-based systems, and a place for all container enthusiasts and professionals to experiment and exchange ideas.
+It provides a "Lego set" of toolkit components, the framework for assembling them into custom container-based systems, and a place for all container enthusiasts and professionals to experiment and exchange ideas.
 Components include container build tools, a container registry, orchestration tools, a runtime and more, and these can be used as building blocks in conjunction with other tools and projects.
 
 ## Principles