Merge pull request #113 from NativeScript/lini/add-development-workflow

docs: add development workflow

Author: tbozhikov

DevelopmentWorkflow.md

@@ -0,0 +1,37 @@
+# Development Workflow
+
+<!-- TOC depthFrom:2 -->
+
+- [Prerequisites](#prerequisites)
+- [Develop locally](#develop-locally)
+- [Testing the plugin](#testing-the-plugin)
+
+<!-- /TOC -->
+
+## Prerequisites
+
+- Install your native toolchain and NativeScript as [described in the docs](https://docs.nativescript.org/start/quick-setup)
+
+- Review [NativeScript plugins documentation](https://docs.nativescript.org/plugins/plugins) for more details on plugins development
+
+## Develop locally
+
+For local development we recommend using the npm commands provided in the root directory of the repository.
+
+To run and develop using TypeScript demo:
+
+```bash
+# Build the plugin. This compiles all TypeScript files in the plugin directory, which is referenced in the demo's package.json
+npm run tsc
+# Run the demo server, which is used to handle uploads from the demo app. Best to run from a separate terminal.
+npm run start-server
+# Run the demo for iOS or Android.
+npm run start-demo-ios
+npm run start-demo-android
+```
+
+## Testing the plugin
+
+The demo application is configured to run on a simulator/emulator on the local machine. If you want to test on a real device, you should change the URL in the `demo/app/home-view-model.ts` to point to the machine that is running the demo server. Be careful if using an online test service, e.g. [http://httpbin.org/post](http://httpbin.org/post). Some services are configured to return the uploaded file contents in the server response, which might crash the demo app if the uploaded file is large.
+
+For details on plugins development workflow, read [NativeScript plugins documentation](https://docs.nativescript.org/plugins/building-plugins#step-2-set-up-a-development-workflow) covering that topic.