[Service Bus] update contributing guide as per guidelines (#1855)

packages/@azure/servicebus/data-plane/CONTRIBUTING.md

@@ -1,9 +1,23 @@
+# Contributing
+
+This project welcomes contributions and suggestions. Most contributions require you to
+agree to a Contributor License Agreement (CLA) declaring that you have the right to,
+and actually do, grant us the rights to use your contribution. For details, visit
+https://cla.microsoft.com.
+
+When you submit a pull request, a CLA-bot will automatically determine whether you need
+to provide a CLA and decorate the PR appropriately (e.g., label, comment). Simply follow the
+instructions provided by the bot. You will only need to do this once across all repositories using our CLA.
+
+This project has adopted the [Microsoft Open Source Code of Conduct](https://opensource.microsoft.com/codeofconduct/).
+For more information see the [Code of Conduct FAQ](https://opensource.microsoft.com/codeofconduct/faq/)
+or contact [opencode@microsoft.com](mailto:opencode@microsoft.com) with any additional questions or comments.
+
 ## What to contribute
-There are many ways that you can contribute to the Azure ServiceBus client project:
+There are many ways that you can contribute to the Azure Service Bus client project:
 
 * Submit a bug
 * Submit a code fix for a bug
-* Submit code to add a new platform/language support to the project, or modify existing code
 * Submit additions or modifications to the documentation
 * Submit a feature request
 
@@ -23,19 +37,16 @@ Some guidance for when you make a contribution:
 * Run end-to-end tests or simple sample code to make sure the lib works in an end-to-end scenario.
 
 ## Building the library
-- Clone the repo and cd to the repo directory
-```
-git clone https://github.com/azure/azure-service-bus-node.git
-cd azure-service-bus-node
-```
 - Install typescript, ts-node globally (optional, but very useful)
 ```
 npm i -g typescript
 npm i -g ts-node
 ```
-- NPM install from the root of the package
+- Clone the repo, cd to the sub folder for service bus and install the dependencies
 ```
-npm i
+git clone https://github.com/azure/azure-sdk-for-js.git
+cd azure-sdk-for-js/packages/@azure/servicebus/data-plane
+npm install
 ```
 - Build the project
 ```
@@ -47,4 +58,4 @@ npm run build
 If you want to run or debug tests in this project, please see our [Test README](https://github.com/Azure/azure-service-bus-node/blob/master/test/README.md).
 
 ## AMQP Dependencies ##
-It depends on [rhea-promise](https://github.com/amqp/rhea-promise) library for managing connections, sending and receiving messages over the [AMQP](http://docs.oasis-open.org/amqp/core/v1.0/os/amqp-core-complete-v1.0-os.pdf) protocol.
+The Service Bus library depends on the [rhea-promise](https://github.com/amqp/rhea-promise) library for managing connections, sending and receiving messages over the [AMQP](http://docs.oasis-open.org/amqp/core/v1.0/os/amqp-core-complete-v1.0-os.pdf) protocol.