Add snapshot versions to documentation

docs/src/docs/asciidoc/rest.adoc

@@ -29,6 +29,19 @@ dependencies {
 }
 ----
 
+====== Snapshot versions
+
+Add the additional snapshot repository to your build.gradle to use snapshot versions which are automatically uploaded after every successful build:
+
+[source,groovy,indent=0]
+----
+repositories {
+    (...)
+    //Required only for SNAPSHOT versions
+    maven { url "https://oss.sonatype.org/content/repositories/snapshots" }
+}
+----
+
 ===== Add maven plugin
 
 [source,xml,indent=0]
@@ -375,4 +388,4 @@ Such tree will cause Accurest generating Wiremock's scenario with name `scenario
  - logout marked as `Step2` which will close the scenario.
 More details about Wiremock scenarios can be found under [http://wiremock.org/stateful-behaviour.html](http://wiremock.org/stateful-behaviour.html)
 
-Accurest will also generate tests with guaranteed order of execution.
+Accurest will also generate tests with guaranteed order of execution.