docs: update readme

README.md

@@ -13,18 +13,17 @@
   <a href="https://twitter.com/invertaseio"><img src="https://img.shields.io/twitter/follow/invertaseio.svg?style=social&label=Follow" alt="Follow on Twitter"></a>
 </p>
 
-
 ---
 
 Jet lets you test your React Native Module APIs in JS mock free and native testing code free - ideal for testing React Native modules e2e.
 
 **Features:**
- - ⏩ Test with JavaScript - write your native module tests in javascript and fully e2e test them.
- - 💯 Coverage -  get full code coverage output for your React Native module's JS API with built in [istanbul/nyc](https://github.com/istanbuljs/nyc) coverage support (`--coverage`).
- - 
 
-![image](https://github.com/invertase/jet/assets/5347038/d0ca2c5b-7eee-48bb-94b5-21881455142d)
+- ⏩ Test with JavaScript - write your native module tests in javascript and fully e2e test them.
+- 💯 Coverage - get full code coverage output for your React Native module's JS API with built in [istanbul/nyc](https://github.com/istanbuljs/nyc) coverage support (`--coverage`).
+-
 
+![image](https://github.com/invertase/jet/assets/5347038/d0ca2c5b-7eee-48bb-94b5-21881455142d)
 
 ---
 
@@ -34,12 +33,71 @@ Jet lets you test your React Native Module APIs in JS mock free and native testi
 
 ## Quick Setup
 
+```sh
+yarn add jet
 ```
-$ yarn add jet
-```
 
-TODO - updated docs
+These docs are still TODO, for now see [example](./example), in particular:
+
+Configuring Jet and targets:
+
+- [.jetrc.js](./example/.jetrc.js)
+
+Adding the test UI and your tests:
 
+- [App.tsx](./example/App.tsx)
+
+Configuring coverage instrumentation:
+
+- [babel.config.js](./example/babel.config.js)
+- [nyc.config.js](./example/nyc.config.js)
+
+### Running tests
+
+```sh
+jet --target=macos
+```
+
+### `.jetrc.js`
+
+Example:
+
+```js
+const proc = require('node:child_process');
+
+module.exports = {
+  config: {
+    // Global config overrides/defaults...
+  },
+  targets: {
+    // Use any key name to specify a new 'target' (--target=<key>)
+    // [key: string]: { ... }
+    macos: {
+      // --target=macos
+      config: {
+        // Per target config overrides...
+        // These will override in order of:
+        // ...cliFlags
+        // ...globalConfig
+        // ...targetConfig
+      },
+      /**
+       * Use this to run builds, start the application etc.
+       */
+      async before(config) {
+        proc.spawnSync('npx', ['react-native', 'run-macos']);
+        return config;
+      },
+      /**
+       * Use this for cleanup & teardown.
+       */
+      async after(config) {
+        console.log('After');
+      },
+    },
+  },
+};
+```
 
 ## 💛 How can I help?