Add hero image
Created by: nickmyyz
@beyang What do you think about this hero image? https://storage.googleapis.com/sourcegraph-assets/blog/monolith-microservices/22_0509-SG-Monolith-Microservices-Illustration-1200x675.png
Created by: nickmyyz
@beyang What do you think about this hero image? https://storage.googleapis.com/sourcegraph-assets/blog/monolith-microservices/22_0509-SG-Monolith-Microservices-Illustration-1200x675.png