docs: Add some basic info for local-only server

docs/hosting-a-server-with-northstar/local-only-server.md

@@ -1 +1,16 @@
 # Hosting a Local-Only Server
+
+If you just want to host server (listen or dedicated) for people in your local network (as in computer network, not the in-game Networks system), you can simply not enable port-forwarding and set `ns_auth_allow_insecure` to `1` in the `autoexec_ns_server.cfg`.
+
+This way players can connect to your server directly by using the `connect` command with the local IP of your server, e.g. `connect 192.168.420.500` (replace with actual local IP of your server).
+
+
+{% hint style="info" %}
+Loadouts are saved by the server and connecting to a server directly using `connect` means that the loadout is not loaded from masterserver. This means your loadouts will be reset while playing on said server.
+
+You should see your saved loadouts again when leaving the local-only server
+{% endhint %}
+
+{% hint style="info" %}
+Even with local-only servers you still need an internet connection to authenticate your account and game ownership with masterserver.
+{% endhint %}