Added recomendation to do a npm install before the first build

content/meta/modules/ROOT/pages/overview/build.adoc

@@ -34,6 +34,17 @@ The prose linter uses rules from third parties distributed via https://vale.sh/h
 $ vale sync
 ----
 
+[.no-prose-lint]
+== Install node dependencies
+
+Before building the docs, specially the first time, it is recommended to install the dependencies used by antora and some of the extensions. To install those dependencies, run the following command in the `axoniq-library-site` folder.
+
+[source,console]
+---
+$ npm install
+---
+
+
 == Build with production configuration
 
 You can build AxonIQ Library locally with the production configuration to ensure you have all the tooling in place and properly configured. To do so, go to the `axoniq-library-site` folder and run the following command.