NestedUnit module implementing an execution pattern using database configuration objects which helps execute code in different implementations or retrieve data from reusable components of data.

Implementations (Built-in):
• Middleware - creating chain of middlewares.
• Condition - checks if conditions are applied on specific data (e.g. url string) and returns callback information. (e.g. applied to create complex routes from simple checks in a reusable way)
• Template - renders nested templates (e.g. producing HTML documents serverside).
• Shellscript - shell script runner (executes shell scripts or other implementations from javascript in different ways - e.g. asynchronously, chronologically, custom implementation).