docs(Nuxt): add layer0SourceMaps option

Author: adrien-k

guides/nuxt.md

@@ -49,10 +49,13 @@ To prepare your Nuxt.js application for {{ PRODUCT_NAME }}:
 // nuxt.config.js
 
 module.exports = {
-  buildModules: ['{{ PACKAGE_NAME }}/nuxt/module'],
+  buildModules: [['{{ PACKAGE_NAME }}/nuxt/module', { layer0SourceMaps: true }]],
 }
 ```
 
+Options:
+- `layer0SourceMaps: true|false`: when true, the serverless build includes sourcemaps files which makes debugging easier using the Log Streamer available in Layer0 Console. On the other hand it increases the bundle side.
+
 2. Run `{{ CLI_NAME }} init` to configure your project for {{ PRODUCT_NAME }}.
 
 ```bash