update the contribution guide

Author: kameshsampath

CONTRIBUTING.md

@@ -3,35 +3,36 @@
 The sources of this tutorial docs is split across multiple repositories:
 
 - The root repository which integrates all other module repositories to build the tutorial site:
- http://github.com/redhat-developer-demos/knative-tutorial.git
+ <http://github.com/redhat-developer-demos/knative-tutorial.git>
 
-- Setup and Knative Serving:
- http://github.com/redhat-developer-demos/knative-tutorial-module-serving.git
+## Tutorial Modules
 
-- Knative Eventing:
- http://github.com/redhat-developer-demos/knative-tutorial-module-eventing.git
+- [Setup](https://github.com/redhat-developer-demos/knative-tutorial/tree/master/documentation/modules/setup)
 
-- Camel-K based Enterprise Integration chapters:
- http://github.com/redhat-developer-demos/knative-tutorial-module-camelk.git
+- [Knative Serving](https://github.com/redhat-developer-demos/knative-tutorial/tree/master/documentation/modules/serving)
 
-- Advanced Integration:
- http://github.com/redhat-developer-demos/knative-tutorial-module-advanced.git
+- [Knative Eventing](https://github.com/redhat-developer-demos/knative-tutorial/tree/master/documentation/modules/eventing)
+
+- [Camel-K](https://github.com/redhat-developer-demos/knative-tutorial/tree/master/documentation/modules/camelk)
+
+- [Advanced Topics](https://github.com/redhat-developer-demos/knative-tutorial/tree/master/documentation/modules/advanced)
 
 ## Running site in development mode
 
 To run the site in development mode you need to have [yarn](https://yarnpkg.com) or [npm](https://nodejs.org/en/) installed with [nodejs](https://nodejs.org) v12.x or above.
 
 After cloning the repositories, you can run the `yarn install` or `npm install` from the `knative-tutorial` repository to install needed nodejs packages.
 
-Start the development site using `yarn run dev` or `npm run dev` command, this should open a local development site in http://localhost:3000. 
+Start the development site using `gulp -s $PWD` that should make the a local development site available at <http://localhost:3000>.
 
 Making any changes to your local repositories above cloned earlier, will be automatically built and the development site gets reloaded automatically.
 
 ## Send your contribution
 
-Now you are all set, 
-- Open an Issue in http://github.com/redhat-developer-demos/knative-tutorial.git
+Now you are all set,
+
+- Open an Issue in <http://github.com/redhat-developer-demos/knative-tutorial.git>
 - Prepare your changes in the respective documentation repository
 - Send the PR to respective repositories listed above
 
-We try to follow the Git commit messages using http://karma-runner.github.io/4.0/dev/git-commit-msg.html and thats not a hard rule ;)
+We try to follow the Git commit messages using <http://karma-runner.github.io/4.0/dev/git-commit-msg.html> and thats not a hard rule ;)