Document system settings in getting_started guide

Author: jbtronics

docs/assets/getting_started/system_settings.png

@@ -12,11 +12,19 @@ Before starting, it's useful to read a bit about the [concepts of Part-DB]({% li
 1. TOC
 {:toc}
 
-## Customize config files
+## Customize system settings
 
-Before you start creating data structures, you should configure Part-DB to your needs by changing possible configuration
-options.
-This is done either via changing the `.env.local` file in a direct installation or by changing the env variables in
+Before starting creating datastructures, you should check the system settings to ensure that they fit your needs.
+After login as an administrator, you can find the settings in the sidebar under `Tools -> System -> Settings`.
+![image]({% link assets/getting_started/system_settings.png %})
+
+Here you can change various settings, like the name of your Part-DB instance (which is shown in the title bar of the
+browser), the default language (which is used if no user preference is set), the default timezone (which is used to
+display times correctly), the default currency (which is used to display prices correctly), and many more.
+
+Some more fundamental settings like database connection, mail server settings, SSO, etc. are configured via environment variables.
+Environment variables also allow to overwrite various settings from the web interface.
+Environment variables can be changed by editing the `.env.local` file in a direct installation or by changing the env variables in
 your `docker-compose.yaml` file.
 A list of possible configuration options can be found [here]({% link configuration.md %}).
 
@@ -44,8 +52,8 @@ used.
 
 ## (Optional) Customize homepage banner
 
-The banner which is shown on the homepage, can be customized/changed by changing the `config/banner.md` file with a text
-editor. You can use markdown and (safe) HTML here, to style and customize the banner.
+The banner which is shown on the homepage, can be customized/changed via the homepage banner setting in system settings. 
+You can use markdown and (safe) HTML here, to style and customize the banner.
 You can even use LaTeX-style equations by wrapping the expressions into `$` (like `$E=mc^2$`, which is rendered inline:
 $E=mc^2$) or `$$` (like `$$E=mc^2$$`) which will be rendered as a block, like so: $$E=mc^2$$
 
@@ -202,4 +210,4 @@ later.
 You can choose from your created datastructures to add manufacturer information, supplier information, etc. to the part.
 You can also create new datastructures on the fly, if you want to add additional information to the part, by typing the
 name of the new datastructure in the field and select the "New ..." option in the dropdown menu. See [tips]({% link
-usage/tips_tricks.md %}) for more information.
+usage/tips_tricks.md %}) for more information.