add readme, change config parameter

Author: sayaamirul

composer.json

@@ -1,5 +1,5 @@
 {
-    "name" : "kawankoding/fcm",
+    "name" : "kawankoding/laravel-fcm",
     "description" : "A package to send Firebase notification cross Laravel Application",
     "authors" : [
         {

readme.md

@@ -0,0 +1,89 @@
+# Laravel FCM
+
+A Simple package that help you send a firebase notification with your laravel applications
+
+### Installation
+
+You can pull the package via composer :
+
+``` bash
+$ composer require spatie/laravel-fractal
+```
+
+ Next, You must register the service provider :
+
+ ``` php
+// config/app.php
+
+'Providers' => [
+    ...
+    Kawankoding\Fcm\Providers\FcmServiceProvider::class,
+]
+ ```
+
+ If you want to make use of the facade you must install it as well:
+
+```php
+// config/app.php
+'aliases' => [
+    ...
+    'Fcm' => Kawankoding\Fcm\Facades\Fcm::class,
+];
+```
+
+Next, You must publish the config file to define your fcm server key :
+
+```bash
+php artisan vendor:publish --provider="Kawankoding\Fcm\Providers\FcmServiceProvider"
+```
+
+This is the contents of the published file:
+
+```php
+return [
+
+    /*
+    * Your Fcm Server Key
+    * Change yo yours
+    */
+
+    'server_key' => '',
+
+];
+```
+
+### Usage
+
+If You want to send a FCM with just notification parameter, this is an example of usage sending a FCM with only data parameter :
+```php
+fcm()
+    ->data([
+        'title' => 'Test FCM',
+        'body' => 'This is a test of FCM',
+    ])
+    ->push();
+```
+
+If You want to send a FCM with just notification parameter,this is an example of usage sending a FCM with only notification parameter :
+```php
+fcm()
+    ->notification([
+        'title' => 'Test FCM',
+        'body' => 'This is a test of FCM',
+    ])
+    ->push();
+```
+
+If You want to send a FCM with both data & notification parameter, this is an example of usage sending a FCM with both data & notification parameter :
+```php
+fcm()
+    ->data([
+        'title' => 'Test FCM',
+        'body' => 'This is a test of FCM',
+    ])
+    ->notification([
+        'title' => 'Test FCM',
+        'body' => 'This is a test of FCM',
+    ])
+    ->push();
+```

resources/config/laravel-fcm.php

@@ -4,7 +4,8 @@
 
     /**
      * Set your FCM Server Key
+     * Change yo yours
      */
 
-    'server-key' => ''
+    'server_key' => ''
 ];

src/Kawankoding/Fcm/Fcm.php

@@ -45,7 +45,7 @@ public function push()
             'notification' => $this->notification
         ];
 
-        $serverKey = config('laravel-fcm.server-key');
+        $serverKey = config('laravel-fcm.server_key');
 
         $headers = [
             'Authorization:key='.$serverKey,