Update DEVELOPMENT.md documentation (#451)

* Update DEVELOPMENT.md

* Remove extra characters

Co-authored-by: Rita Zerrizuela <zeta@widcket.com>

Author: poovamraj

DEVELOPMENT.md

@@ -1,10 +1,25 @@
 ## Setup the development environment
 
-This project uses yarn.
+To test the SDK manually, follow the below steps
 
-- Run `yarn install` to set up the environment.
-- Make the changes you desire and push them to a Github repository.
-- On your application project, run `yarn add <git remote url>#<branch/commit/tag>`.
-- Run the tests with `yarn test`.
+- Ensure [yarn](https://yarnpkg.com/) is setup in your machine.
+- Download or Clone the sample app from [here](https://github.com/auth0-samples/auth0-react-native-sample/tree/master/00-Login).
+- Change the path of react-native-auth0 in package.json to the path of the SDK in your computer
 
-For more information, see [yarn docs](https://yarnpkg.com/lang/en/docs/cli/add/).
+```shell
+"react-native-auth0": "../{PATH IN COMPUTER}/react-native-auth0"
+```
+
+- Few folders have to be deleted to ensure the correct version of the SDK is installed.
+
+```shell
+rm -rf node_modules ios/Pods ios/Podfile.lock
+```
+
+- Install the required dependencies.
+
+```shell
+yarn install && ( cd ios && pod install )
+```
+
+- run `yarn run android` or `yarn run ios` to run the app with the new version of SDK