diff --git a/doc/ADMIN.md b/doc/ADMIN.md
index ce7057a..b5b7547 100644
--- a/doc/ADMIN.md
+++ b/doc/ADMIN.md
@@ -30,6 +30,15 @@ Once logged in, under the Web directory you will see a `www` folder which contai
 
 If you want to add tweak the nginx configuration for this app, it is recommended to edit `/etc/nginx/conf.d/__DOMAIN__.d/__ID__.d/WHATEVER_NAME.conf` (ensure that the file has the `.conf` extension) and reload the nginx after making sure that the configuration is valid using `nginx -t`.
 
-### Listening the right port for NodeJS
+{% if nodeversion != 'none' %}
 
-The listen port is available to the node process throught the environment variable `PORT`. Make sure that your main `.js` file retrieves it with `process.env.PORT` as its value is not predictable.
+### Interfacing with NodeJS
+
+A `package.json` should be available within the `/var/www/__APP__/www`. It is used to `npm install`, `npm run build` then `npm run start`. As such, it should at least define the dependencies and provide the `build` and `install` scripts.
+
+You should then start a server in `/var/www/__APP__/www/index.js`.
+It should listen on the port provided through the `PORT` environment with `process.env.PORT` or statically with __PORT__.
+
+The server should reload its files after they change, but due to systemd's limitations, it only works for top level folders/files.
+If your server does not display the right things, restart the `__APP__-nodejs` service.
+{% endif %}