doc: update README about development & testing (#1308)

Co-authored-by: エリス <erisu@users.noreply.github.com>

README.md

@@ -28,22 +28,44 @@
 
 Cordova Android is an Android application library that allows for Cordova-based projects to be built for the Android Platform. Cordova based applications are, at the core, applications written with web technology: HTML, CSS and JavaScript.
 
-[Apache Cordova](https://cordova.apache.org) is a project of The Apache Software Foundation (ASF).
+[Apache Cordova](https://cordova.apache.org/) is a project of [The Apache Software Foundation (ASF)](https://apache.org/).
 
 ## Requirements
 
-- Java Development Kit (JDK) 11
-- [Android SDK](https://developer.android.com/)
+* Java Development Kit (JDK) 11
+* [Android SDK](https://developer.android.com/)
+* [Node.js](https://nodejs.org)
 
-## Cordova Android Developer Tools
+## Create a Cordova project
 
-Use the [Cordova command-line tool](https://www.npmjs.com/package/cordova) to create projects and install plugins.
+Follow the instructions in the [**Create your first Cordova app**](https://cordova.apache.org/docs/en/latest/guide/cli/index.html) section of [Apache Cordova Docs](https://cordova.apache.org/docs/en/latest/)
 
-## Using Android Studio
+To use a **shared framework**, for example in development, link the appropriate cordova-android platform folder path:
 
-1. Create a project
-2. Import it via "Non-Android Studio Project"
+```bash
+cordova platform add --link /path/to/cordova-android
+```
 
-## Running the Native Tests
+## Updating a Cordova project
 
-The `test/` directory in this project contains an Android test project that can be used to run different kinds of native tests. Check out the [README contained therein](test/README.md) for more details!
+When you install a new version of the [`Cordova CLI`](https://www.npmjs.com/package/cordova) that pins a new version of the [`Cordova-Android`](https://www.npmjs.com/package/cordova-android) platform, you can follow these simple upgrade steps within your project:
+
+```bash
+cordova platform rm android
+cordova platform add android
+```
+
+## Debugging in Android Studio
+
+Import project in Android Studio through _File > Open_ and targeting `/path/to/your-cdv-project/platforms/android/`.
+
+## How to Test Repo Development
+
+```bash
+npm install
+npm test
+```
+
+## Further reading
+
+* [Apache Cordova](https://cordova.apache.org/)