Update README (#2)

README.md

@@ -1,2 +1,38 @@
-# ultravox-client-sdk-ios
-iOS client SDK for Ultravox.
+# Ultravox client SDK for iOS
+iOS client SDK for [Ultravox](https://ultravox.ai).
+
+[![swift package](https://img.shields.io/endpoint?url=https%3A%2F%2Fswiftpackageindex.com%2Fapi%2Fpackages%2Ffixie-ai%2Fultravox-client-sdk-ios%2Fbadge%3Ftype%3Dswift-versions&color=orange)](https://swiftpackageindex.com/fixie-ai/ultravox-client-sdk-ios)
+[![](https://img.shields.io/endpoint?url=https%3A%2F%2Fswiftpackageindex.com%2Fapi%2Fpackages%2Ffixie-ai%2Fultravox-client-sdk-ios%2Fbadge%3Ftype%3Dplatforms&color=orange)](https://swiftpackageindex.com/fixie-ai/ultravox-client-sdk-ios)
+
+## Getting started
+
+Using XCode, under `Project Settings` -> `Swift Packages` add a new package: `https://github.com/fixie-ai/ultravox-client-sdk-ios`
+
+Or you can directly add to your `Package.swift`:
+
+```swift
+let package = Package(
+  ...
+    dependencies: [
+        .package(url: "https://github.com/fixie-ai/ultravox-client-sdk-ios.git", .upToNextMajor("0.0.1")),
+    ],
+    targets: [
+        .target(
+            name: "MyApp",
+            dependencies: [
+                .product(name: "Ultravox", package: "ultravox-client-sdk-ios"),
+            ]
+        ),
+    ]
+)
+```
+
+## Usage
+
+```swift
+let session = UltravoxSession()
+await session.joinCall(joinUrl: "joinUrlFromYourServer");
+await session.leaveCall();
+```
+
+See the example app at https://github.com/fixie-ai/ultravox-client-sdk-ios-example for a more complete example. To get a `joinUrl`, you'll want to integrate your server with the [Ultravox REST API](https://fixie-ai.github.io/ultradox/).