updated README.md

Author: Jani Giannoudis

README.md

@@ -1,11 +1,17 @@
 <h1>Payroll Engine Client Scripting</h1>
 
-The scripting library which determines the commonality between the backend and the clients:
+The scripting library that defines the commonality between the backend and the clients:
 - Scripting functions
 - Scripting runtime
 - Script parsers
 - System scripts
 
+## HTML documentantion
+The client scripting library contains static HTML documentation for scripting developers. This is created using [docx](https://github.com/dotnet/docfx) [MIT]. The following commands are available in the `docfx` folder:
+- `Static.Build` - builds the static HTML content (output is the `_site` subdirectory)
+- `Static.Static` - opens the static help (`_site\index.html`)
+- `Server.Start` - start the static help on http://localhost:5865/ (dark mode support)
+
 ## Build
 Supported runtime environment variables:
-- *PayrollEnginePackageDir* - the NuGet package target direcotry (optional)
+- *PayrollEnginePackageDir* - the NuGet package destination directory (optional)