docs(readme): add readme

README.md

@@ -0,0 +1,55 @@
+# Smoothly Animated ToDo App built with React Native
+
+![Thumbnail](./doc/thumb.jpg)
+
+Try the demo on [![Expo Go](./doc/expo-logo.svg)](https://expo.dev/@craftzdog/animated-todo)
+
+The animated checkbox component has been published as [an NPM module `react-native-checkbox-reanimated`](https://github.com/craftzdog/react-native-checkbox-reanimated).
+
+![demo](./doc/checkbox.gif)
+
+## Tutorial
+
+Watch how I built this website on YouTube: [<img src="./doc/youtube.png" width="32" />](https://youtu.be/k2h7usLLBhY)
+
+## Stack
+
+- [React Native](https://reactnative.dev/) - ReactJS-based framework that can use native platform capabilities
+- [Expo](https://expo.dev/) - Toolset for building and delivering RN apps
+- [React Navigation(v6)](https://reactnavigation.org/) - Routing and navigation
+- [NativeBase(v3)](https://nativebase.io/) - Themable component library
+- [React Native Reanimated](https://docs.swmansion.com/react-native-reanimated/) - Animations
+- [React Native SVG](https://github.com/react-native-svg/react-native-svg) - Drawing SVG
+- [Moti](https://moti.fyi/) - Helper module for Reanimated 2
+
+## Project structure
+
+```
+$PROJECT_ROOT
+├── App.tsx        # Entry point
+└── src
+    ├── screens    # Screen components
+    ├── components # UI components
+    ├── utils      # Custom hooks and helpers
+    └── assets     # Image files
+```
+
+## Credits
+
+- [SALY 3D Illustration Pack](https://www.figma.com/community/file/890095002328610853)
+- [Animated SVG stroke example by William Candillon](https://github.com/wcandillon/can-it-be-done-in-react-native/tree/master/reanimated-2/src/StrokeAnimation)
+
+## How to dev
+
+This project can be run from the Expo client app.
+
+```sh
+yarn
+yarn start
+```
+
+---
+
+Looking for a Markdown note-taking app? Check out my app called Inkdrop:
+
+[![Inkdrop](https://github.com/craftzdog/dotfiles-public/raw/master/images/inkdrop.png)](https://www.inkdrop.app/)