chore(doc): update information about config

readme.md

@@ -11,4 +11,17 @@ cargo install hwt_ui
 
 ## Usage
 
-Type `hwt` in the terminal.
+Type `hwt` in the terminal and the status window of the timers will open with
+the default parameters
+
+```sh
+hwt
+```
+
+If you want to customize the timers, you can create a configuration file based
+on [the example](./config.example.toml). Then pass path to your configuration
+file as additional parameter.
+
+```sh
+hwt ./config.example.toml
+```