I searched the source code for this but I cant seem to find anything. I am looking for an indicator that tells me whether nuxt is being built or not. My nuxt plugin checks when used whether favicons have been set and if not it retrieves them. This process only needs to run during nuxt build and can be skipped during nuxt start as the plugin either adds the favicon as assets to the webpack configuration or extracts them to the static folder.
At the moment my plugin is also called during nuxt start which just isnt usefull.