Merge pull request #15 from gaojun2048/master

[feature] Add how to verify the release candidate to REAMME.md file
diff --git a/README.md b/README.md
index bcf456f..6ba7ea3 100644
--- a/README.md
+++ b/README.md
@@ -14,3 +14,27 @@
 
 With this maven plug-in, by scanning the pom file of the project ,The pluginloader can find the module identified by <package>dolphinscheduler-plugin</package>, then can load this module`s class files and its dependent third-party jars from the target/classes dir of the plug-in module. This will debug locally
 
+### How to verify the release candidate
+
+1. Download the apache-dolphinscheduler-maven-plugin-incubating-${RELEASE.VERSION}-src.zip file from `the release candidates` (it will be provided in the vote email).
+
+2. unzip the apache-dolphinscheduler-maven-plugin-incubating-${RELEASE.VERSION}-src.zip file
+
+3. cd apache-dolphinscheduler-maven-plugin-incubating-${RELEASE.VERSION}-src-release and run `mvn clean install -DskipTests=true`
+
+4. add this plugin to your project`s pom.xml file like this:
+
+    ```
+    <plugins>
+    ...
+        <plugin>
+            <groupId>org.apache.dolphinscheduler</groupId>
+            <artifactId>dolphinscheduler-maven-plugin</artifactId>
+            <version>${RELEASE.VERSION}</version>
+            <extensions>true</extensions>
+        </plugin>
+    ...
+    </plugins>
+    ```
+
+5. run `mvn clean verify` test the plugin.
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