Changes to docs for 20.04 lambda layered deploy.

admin_guide/install/install_defender/install_serverless_defender_layer.adoc

@@ -29,7 +29,7 @@ To secure an AWS Lambda function with the Serverless Defender layer:
 
 . Define a serverless CNAF policy.
 
-. Add the layer to your function, wrap your handler, and set an environment variable.
+. Add the layer to your function, update the handler, and set an environment variable.
 After completing this integration, Serverless Defender runs when your function is invoked.
 
 
@@ -185,39 +185,12 @@ When you return to the function designer, you'll see that your function now uses
 +
 image::serverless_layer_function_designer_layers2.png[width=250]
 
-. Import the Serverless Defender layer into your function by adding the appropriate line to your code depending on your runtime.
-+
-* If your runtime is *Python*, wrap your function's handler as follows:
-
-  import twistlock
-  @twistlock.serverless.handler
-  def handler(event, context):
-    .
-    .
-    .
-+
-* If your runtime is *Node.js*, and your handler is asynchronous, wrap your function as follows:
-
-  // Async handler
-  var twistlock = require('twistlock');
-  exports.handler = async (event, context) => {
-    .
-    .
-    .
-  };
-+
-* If your runtime is *Node.js*, and your handler is synchronous, wrap your function as follows:  
+. Update the handler for your function to be _twistlock.handler_. 
 
-  // Non-async handler
-  var twistlock = require('twistlock');
-  exports.handler = (event, context, callback) => {
-    .
-    .
-    .
-  };
-  exports.handler = twistlock.handler(exports.handler);
+image::lambda_handler.png[width=700]
 
-. Set the TW_POLICY environment variable, which specifies how your function connects to Compute Console to retrieve policy and send audits.
+
+. Set the _TW_POLICY_ and _ORIGINAL_HANDLER_ environment variable, which specifies how your function connects to Compute Console to retrieve policy and send audits.
 
 .. In Compute Console, go to *Manage > Defenders > Deploy > Single Defender*.
 
@@ -233,8 +206,11 @@ image::serverless_layer_function_designer_layers2.png[width=250]
 
 .. For *Value*, paste the rule you copied from Compute Console.
 
+.. For _ORIGINAL_HANDLER_, this is the original value of handelr for your function before your modification. 
+
 . Click *Save* to preserve all your changes.
 +
-image::serverless_layer_function_designer_layers3.png[width=250]
+image::lambda_env_variables.png[width=700]
+