Updating layer example

_examples/how-to-use-lambda-layers-in-your-serverless-app.md

@@ -61,9 +61,10 @@ An SST app is made up of two parts.
 
    The code that's run when your API is invoked is placed in the `packages/functions/` directory of your project.
 
-3. `layers` - Lambda Layers
+3. `layers/` — Lambda Layers
+
+   The Lambda layer that contains Chromium.
 
-   The code that's run when your API is invoked is placed in the `packages/functions/` directory of your project.
 ## Creating the API
 
 Let's start by creating our API.
@@ -89,6 +90,8 @@ export function ExampleStack({ stack }: StackContext) {
           runtime: "nodejs18.x",
           // Increase the timeout for generating screenshots
           timeout: 15,
+          // Increase the memory
+          memorySize: "2 GB",
           // Load Chrome in a Layer
           layers: [layerChromium],
           // Exclude bundling it in the Lambda function
@@ -109,20 +112,38 @@ export function ExampleStack({ stack }: StackContext) {
 }
 ```
 
-Here, we will download the Layer from the [Sparticuz/chromium](https://github.com/Sparticuz/chromium/releases/tag/v114.0.0) GitHub release. Create folder `layers/chromium` in the root of the project and unzip the file layer then you will have `layers/chromium/nodejs`. The `nodejs` folder contains the `node_modules` folder and the `package.json` file.
+We then use the [`Api`]({{ site.docs_url }}/constructs/Api) construct and add a single route (`GET /`). For the function that'll be handling the route, we increase the timeout, since generating a screenshot can take a little bit of time.
 
-We then use the [`Api`]({{ site.docs_url }}/constructs/Api) construct and add a single route (`GET /`). For the function that'll be handling the route, we increase the timeout, since generating a screenshot can take a little bit of time. We then reference the Layer we want and exclude the Lambda function from bundling the [@sparticuz/chromium](https://github.com/Sparticuz/chromium) npm package.
+We create a layer based on what's in the `layers/chromium` directory, we'll download this below. We also exclude the Lambda function from bundling the [@sparticuz/chromium](https://github.com/Sparticuz/chromium) npm package.
 
 Finally, we output the endpoint of our newly created API.
 
-## Adding function code
+## Install Chromium
+
+We need to install Chromium so we can run it locally and we need to install it so we can package it up as a Lambda layer.
 
-Download chromium locally, then you will have YOUR_LOCAL_CHROMIUM_PATH. You will need it in lambda function to run chromium.
+### Installing locally
+
+{%change%} Download Chromium locally, then you will have `YOUR_LOCAL_CHROMIUM_PATH`. You will need it in Lambda function to run Chromium locally.
 
 ```bash
 $ npx @puppeteer/browsers install chromium@latest --path /tmp/localChromium
 ```
 
+### Download Layer
+
+{%change%} Create a `layers/chromium` directory.
+
+```bash
+$ mkdir -p layers/chromium
+```
+
+{%change%} Download the asset that looks like `chromium-v121.0.0-layer.zip` from the [@sparticuz/chromium](https://github.com/Sparticuz/chromium/releases/) GitHub releases.
+
+{%change%} Unzip and copy the `node_modules/` directory to the `layers/chromium/` directory.
+
+## Adding function code
+
 Now in our function, we'll be handling taking a screenshot of a given webpage.
 
 {%change%} Replace `packages/functions/src/lambda.ts` with the following.
@@ -190,13 +211,12 @@ export const handler: APIGatewayProxyHandlerV2 = async (event) => {
 
 First, we grab the webpage URL and dimensions for the screenshot from the query string. We then launch the browser and navigate to that URL, with those dimensions and take the screenshot.
 
-Now let's install the npm packages we need.
+Now let's install the npm packages we need. You need to check [Puppeteer's Chromium Support page](https://pptr.dev/chromium-support) and install the **correct version of Chromium**. At the moment writing this tutorial, `puppeteer-core@20` is compatible with `Chromium@113` is most stable.
 
 {%change%} Run the below command in the `packages/functions/` folder.
-Please check [Puppeteer's Chromium Support page](https://pptr.dev/chromium-support) and install the correct version of Chromium. At the moment writing this tutorial, puppeteer-core@20 is compatible with Chromium@113 is most stable.
 
 ```bash
-$ npm install puppeteer-core^20.1.2 @sparticuz/chromium^113.0.1
+$ npm install puppeteer-core@20.1.2 @sparticuz/chromium@113.0.1
 ```
 
 ## Starting your dev environment