update readme

Author: Ryan Miville

README.md

@@ -5,34 +5,68 @@ Write AWS Lambda functions in Gleam!
 [![Package Version](https://img.shields.io/hexpm/v/glambda)](https://hex.pm/packages/glambda)
 [![Hex Docs](https://img.shields.io/badge/hex-docs-ffaff3)](https://hexdocs.pm/glambda/)
 
+Write your Lambda function as a [wisp](https://github.com/gleam-wisp/wisp) handler, or accept direct events as normal Gleam types.
+
+Glambda works by compiling your Gleam code to JavaScript, and then using the AWS Lambda Node.js runtime to run your code.
+
 ```sh
 gleam add glambda
 ```
+
+## Wisp Handler
+
 ```gleam
-  // .src/handler.gleam
-  import glambda.{
-    type ApiGatewayProxyEventV2, type ApiGatewayProxyResultV2, type Context,
-    type JsContext, type JsEvent, type JsResult, ApiGatewayProxyResultV2,
-  }
-  import gleam/javascript/promise.{type Promise}
-
-  pub fn typed_handler(event: ApiGatewayProxyEventV2, ctx: Context) -> Promise(ApiGatewayProxyResultV2) {
-    let response =
-      ApiGatewayProxyResultV2(
-        status_code: 200,
-        headers: dict.from_list([#("Content-Type", "text/plain")]),
-        body: Some("hello! from " <> ctx.function_name),
-        is_base64_encoded: False,
-        cookies: [],
-      )
-    promise.new(fn(resolve) { resolve(response) })
-  }
-
-  pub fn handler(event: JsEvent, ctx: JsContext) -> Promise(JsResult) {
-    glambda.api_gateway_proxy_v2_handler(typed_handler)(event, ctx)
-  }
+import glambda.{type Context}
+import gleam/javascript/promise.{type Promise}
+import gleam/json
+import wisp.{type Request, type Reponse}
+
+fn handle_request(req: Request, ctx: Context) -> Promise(Response) {
+  string_builder.from_string(
+    "{\"functionName\": \"" <> ctx.function_name <> "\"}",
+  )
+  |> wisp.json_response(200)
+  |> promise.resolve
+}
+
+pub fn handler(event, ctx) {
+  glambda.wisp_handler(handle_request)(event, ctx)
+}
 ```
 
+## Event Handler
+
+```gleam
+import glambda.{
+  type ApiGatewayProxyEventV2, type ApiGatewayProxyResultV2, type Context,
+  ApiGatewayProxyResultV2,
+}
+import gleam/dict
+import gleam/javascript/promise.{type Promise}
+import gleam/option.{Some}
+
+fn event_handler(
+  _event: ApiGatewayProxyEventV2,
+  ctx: Context,
+) -> Promise(ApiGatewayProxyResultV2) {
+  ApiGatewayProxyResultV2(
+    status_code: 200,
+    headers: dict.new() |> dict.insert("content-type", "application/json"),
+    body: Some("{\"functionName\": \"" <> ctx.function_name <> "\"}"),
+    is_base64_encoded: False,
+    cookies: [],
+  )
+  |> promise.resolve
+}
+
+pub fn handler(event, ctx) {
+  glambda.api_gateway_proxy_v2_handler(event_handler)(event, ctx)
+}
+```
+
+## Supported Events
+* `ApiGatewayProxyEventV2`
+
 Further documentation can be found at <https://hexdocs.pm/glambda>.
 
 ## Development