Update hosting_nextjs.yml

Next.js needs Node 18.18 or later
https://nextjs.org/docs/getting-started/installation

`next export` has been removed in favor of 'output: export' in next.config.js.
Learn more: https://nextjs.org/docs/app/building-your-application/deploying/static-exports

Author: damianzm-aws

resources/build_config_templates/hosting_nextjs.yml

@@ -3,10 +3,9 @@ version: 0.2
 phases:
   build:
     commands:
-      - n install 18.17.0
+      - n install 18.18.0
       - npx npm install
       - npx next build
-      - npx next export   
       - cd out
       - echo aws s3 cp ./ s3://$DEST_BUCKET_NAME/$CODEBUILD_RESOLVED_SOURCE_VERSION/ --recursive #don't change this line
       - aws s3 cp ./ s3://$DEST_BUCKET_NAME/$CODEBUILD_RESOLVED_SOURCE_VERSION/ --recursive #don't change this line