feat: allow to set custom handler (#2409)

Author: nalejandroveron

packages/serverless-components/nextjs-cdk-construct/src/index.ts

@@ -151,7 +151,7 @@ export class NextJSLambdaEdge extends Construct {
     this.defaultNextLambda = new lambda.Function(this, "NextLambda", {
       functionName: toLambdaOption("defaultLambda", props.name),
       description: `Default Lambda@Edge for Next CloudFront distribution`,
-      handler: "index.handler",
+      handler: props.handler || "index.handler",
       currentVersionOptions: {
         removalPolicy: RemovalPolicy.DESTROY // destroy old versions
       },

packages/serverless-components/nextjs-cdk-construct/src/props.ts

@@ -63,6 +63,11 @@ export interface Props extends StackProps {
     imageCache?: string;
     lambdaCache?: string;
   };
+  /**
+   * If you use a custom handler with `.build()`, you can set the handler here.
+   */
+  handler?: string;
+
   /**
    * Enable logging on the cloudfront distribution
    */