Add splunk configuration example. Explained properties.

README.md

@@ -147,16 +147,34 @@ Arguments:
 
 Upon installation, RET prompts you for the following config properties:
 
-| Property        | Description                                                     |
-|-----------------|-----------------------------------------------------------------|
-| splunk_base_url | The base url where your Splunk is deployed                      |
-| splunk_app      | The app name of your Splunk instance that should be searched on |
+| Property        | Description                                                                     |
+|-----------------|---------------------------------------------------------------------------------|
+| splunk_base_url | The base url where your Splunk is deployed                                      |
+| splunk_app      | The app name of your Splunk instance that should be searched on                 |
+| indexes         | Indexes of your Splunk instance that should be searched on (optional)           |
+| search_field    | Unique identifier of your Splunk instance that should be searched on (optional) |
 
 The final url that will be used by the Splunk plugin has this format:
 ```
 "${splunkBaseUrl}/en-GB/app/${splunkApp}/search"
 ```
 
+Configuration example
+```
+{
+  "plugin_version" : "0.1.0",
+  "base_url" : "https://my.splunk.com:8080",
+  "app" : "my_app",
+  "indexes" : "my_index_a, my_index_b",
+  "search_field" : "app_name",
+  "projects" : [ {
+    "name" : "my-project-x"
+  }, {
+    "name" : "my-project-y"
+  } ]
+}
+```
+
 ### Search on Splunk
 You can search on Splunk and already type your query in the commandline, before opening the Splunk web page. Optionally,
 RET allows you to specify some properties (Cloud Foundry application name and index).