Updated Response Templating (markdown)

Response-Templating.md

@@ -2,7 +2,7 @@
 Response headers and bodies can optionally be rendered using [Handlebars.Net](https://github.com/rexm/Handlebars.Net) templates.
 This enables attributes of the request to be used in generating the response e.g. to pass the value of a request ID header as a response header or render an identifier from part of the URL in the response body. To use this functionality, add `.WithTransformer()` to the response builder.
 
-Example:
+C# Example:
 ```csharp
 var server = FluentMockServer.Start();
 server
@@ -11,13 +11,36 @@ server
   )
   .RespondWith(
     Response.Create()
-      .WithStatusCode(200)
-      .WithHeader("Content-Type", "text/plain")
       .WithBody("Hello world! Your path is {{request.path}}.")
       .WithTransformer()
   );
 ```
 
+Mapping Json Example:
+``` js
+{
+    "Guid": "fd8ca21b-db82-48bc-ae5a-fc2153c2b0db",
+    "Request": {
+        "Path": {
+            "Matchers": [
+                {
+                    "Name": "WildcardMatcher",
+                    "Pattern": "/bodyasfile_transform123"
+                }
+            ]
+        },
+        "Methods": [
+            "get"
+        ]
+    },
+    "Response": {
+        "Headers": { "Content-Type": "application/xml" },
+        "BodyAsFile": "c:\\temp-wiremock\\__admin\\mappings\\_{{request.query.MyUniqueNumber}}_\\MyXmlResponse.xml",
+    	"UseTransformer": true
+    }
+}
+```
+
 ### The request model
 The model of the request is supplied to the header and body templates. The following request attributes are available:
 
@@ -40,6 +63,11 @@ The model of the request is supplied to the header and body templates. The follo
 All of the standard helpers (template functions) provided by the C# Handlebars implementation plus all of the string helpers are available e.g.
 `{{capitalize request.query.search}}`
 
+
+### Transform the content from a referenced file
+By default, only the response (headers, statuscode, body) are transformed when the  `.WithTransformer()` or `UseTransformer` are defined.
+In case you also want to transform the contents from a referenced file (via `BodyAsFile`), an additional parameter need to added. Like `.WithTransformer(bool)` or `UseTransformerForBodyAsFile = true`.
+
 ### Generate Random Data Support
 It's possible to return random data using the `Random` Handlebars function.