Added book info

README.md

@@ -4,8 +4,19 @@
 
 This is a reference application built with the ABP Framework. It implements Domain Driven Design with multiple application layers.
 
+## The book
+
+This solution is originally prepared to be a real-world example for the **Mastering ABP Framework** book.
+
+![abp-book](etc/images/abp-book.png)
+
+**The book is the only source that explain the solution**. The solution is highly referred in the *Understanding the Reference Solution*, *Domain Driven Design* and other parts of the book.
+
+**You can order the book on [Amazon](https://www.amazon.com/gp/product/B097Z2DM8Q) or on [Packt's website](https://www.packtpub.com/product/mastering-abp-framework/9781801079242).**
+
 ## How to run
 
+* Run `EventHub.DbMigrator` to create the database.
 * Run `etc/docker/up.ps1` before running the solution.
 * Run `EventHub.IdentityServer`
 * Run `EventHub.HttpApi.Host`