Added README file

templates/app-nolayers/README.md

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+## About this solution
+
+This is a minimalist, non-layered startup solution with the ABP Framework. All the fundamental ABP modules are already installed.
+
+## How to run
+
+The application needs to a database. Run the following command in the `MyCompanyName.MyProjectName` directory:
+
+````bash
+dotnet run --migrate-database
+````
+
+This will create and seed the initial database. Then you can run the application with any IDE that supports .NET.
+
+Happy coding..!
+
+
+