add support links to the README.md

Author: stevehu

README.md

@@ -1,4 +1,14 @@
 # openapi-parser
-A light-weight, fast OpenAPI 3.0 parser and validator with minimum third party dependencies. It is based on
-the generated code from [KaiZen OpenAPI Parser](https://github.com/RepreZen/KaiZen-OpenApi-Parser) without
+
+A light-weight, fast OpenAPI 3.0 parser and validator with minimum third party dependencies. 
+
+[Stack Overflow](https://stackoverflow.com/questions/tagged/light-4j) |
+[Google Group](https://groups.google.com/forum/#!forum/light-4j) |
+[Gitter Chat](https://gitter.im/networknt/light-rest-4j) |
+[Subreddit](https://www.reddit.com/r/lightapi/) |
+[Youtube Channel](https://www.youtube.com/channel/UCHCRMWJVXw8iB7zKxF55Byw) |
+[Documentation](https://doc.networknt.com/library/openapi-parser/) |
+[Contribution Guide](https://doc.networknt.com/contribute/) |
+
+It is based on the generated code from [KaiZen OpenAPI Parser](https://github.com/RepreZen/KaiZen-OpenApi-Parser) without
 dependency on javaparser-core, guava, commons-cli, commons-io, javax.mail and guice.