updated documentation

src/site/markdown/dependency-check-gradle/configuration-purge.md

@@ -0,0 +1,34 @@
+Tasks
+====================
+
+Task                                                | Description
+----------------------------------------------------|-----------------------
+[dependencyCheck](configuration.html)               | Runs dependency-check against the project and generates a report.
+[dependencyCheckUpdate]](configuration-update.html) | Updates the local cache of the NVD data from NIST.
+dependencyCheckPurge                                | Deletes the local copy of the NVD. This is used to force a refresh of the data.
+
+Configuration: dependencyCheckPurge
+====================
+
+#### Example
+```groovy
+dependencyCheckPurge {
+}
+```
+
+### Advanced Configuration
+
+The following properties can be configured in the dependencyCheckPurge task. However, they are less frequently changed.
+
+Config Group | Property          | Description                                                                                 | Default Value
+-------------|-------------------|---------------------------------------------------------------------------------------------|------------------
+data         | directory         | Sets the data directory to hold SQL CVEs contents. This should generally not be changed.    |  
+
+$H$H$H$H Example
+```groovy
+dependencyCheckPurge {
+    data {
+        directory='d:/nvd'
+    }
+}
+```