docs: data of generate config feature in readme

Author: OutdatedGuy

README.md

@@ -10,7 +10,29 @@ A command-line tool which simplifies the task of updating your Flutter app's lau
 
 ### 1. Setup the config file
 
-Add your Flutter Launcher Icons configuration to your `pubspec.yaml` or create a new config file called `flutter_launcher_icons.yaml`.
+Run the following command to create a new config automatically:
+
+```shell
+flutter pub run flutter_launcher_icons:generate
+```
+
+This will create a new file called `flutter_launcher_icons.yaml` in your `flutter` project's root directory.
+
+If you want to override the default location or name of the config file, use the `-f` flag:
+
+```shell
+flutter pub run flutter_launcher_icons:generate -f <your config file name here>
+```
+
+To override an existing config file, use the `-o` flag:
+
+```shell
+flutter pub run flutter_launcher_icons:generate -o
+```
+
+OR
+
+Add your Flutter Launcher Icons configuration to your `pubspec.yaml`.  
 An example is shown below. More complex examples [can be found in the example projects](https://github.com/fluttercommunity/flutter_launcher_icons/tree/master/example).
 
 ```yaml
@@ -36,25 +58,25 @@ flutter_launcher_icons:
     image_path: "path/to/image.png"
 ```
 
-If you name your configuration file something other than `flutter_launcher_icons.yaml` or `pubspec.yaml` you will need to specify
-the name of the file when running the package.
+### 2. Run the package
+
+After setting up the configuration, all that is left to do is run the package.
 
 ```shell
 flutter pub get
-flutter pub run flutter_launcher_icons -f <your config file name here>
+flutter pub run flutter_launcher_icons
 ```
 
-Note: If you are not using the existing `pubspec.yaml` ensure that your config file is located in the same directory as it.
-
-### 2. Run the package
-
-After setting up the configuration, all that is left to do is run the package.
+If you name your configuration file something other than `flutter_launcher_icons.yaml` or `pubspec.yaml` you will need to specify
+the name of the file when running the package.
 
 ```shell
 flutter pub get
-flutter pub run flutter_launcher_icons
+flutter pub run flutter_launcher_icons -f <your config file name here>
 ```
 
+Note: If you are not using the existing `pubspec.yaml` ensure that your config file is located in the same directory as it.
+
 If you encounter any issues [please report them here](https://github.com/fluttercommunity/flutter_launcher_icons/issues).
 
 In the above configuration, the package is setup to replace the existing launcher icons in both the Android and iOS project