Merge pull request #2 from PetrHeinz/ph/improve-installation-steps

README.md: improve installation steps

README.md

@@ -9,8 +9,14 @@ In order to use the extension you must first build and deploy it into your AWS i
 
 ```shell
 $ git clone [email protected]:stockstory/logtail-lambda-extension.git
+$ cd logtail-lambda-extension
+$ pnpm install
 $ pnpm run build
-$ aws lambda publish-layer-version --layer-name "logtail-lambda-extension" --region us-west-2 --zip-file "fileb://./dist/extension.zip"
+$ aws lambda publish-layer-version \
+      --layer-name "logtail-lambda-extension" \
+      --zip-file "fileb://./dist/extension.zip" \
+      --compatible-runtimes nodejs16.x nodejs18.x \
+      --compatible-architectures x86_64 arm64
 ```
 
 Once deployed set the `LOGTAIL_TOKEN` environment variable on your Lambda to your HTTP API source from Logtail, and [add the layer](https://docs.aws.amazon.com/lambda/latest/dg/invocation-layers.html) to your Lambda function.