Update readme

Author: DivineOmega

README.md

@@ -1 +1,70 @@
-# php-server-info
+# PHP Server Info
+
+## Installation
+
+```bash
+composer require divineomega/php-server-info
+```
+
+## Usage
+
+```php
+<?php
+
+use DivineOmega\ServerInfo\Server;
+use DivineOmega\SSHConnection\SSHConnection;
+
+require_once __DIR__.'/../vendor/autoload.php';
+
+$connection = (new SSHConnection())
+    ->to('example.com')
+    ->as('username')
+    ->withPrivateKey('/home/user/.ssh/id_rsa');
+
+$array = (new Server($connection))
+    ->metrics()
+    ->toArray();
+
+var_dump($array);
+```
+
+```php
+array(14) {
+  ["uptime"]=>
+  int(7564013)
+  ["hostname"]=>
+  string(11) "example"
+  ["disk-usage-percentage"]=>
+  int(29)
+  ["total-disk-space-bytes"]=>
+  int(18045964)
+  ["memory-usage-percentage"]=>
+  int(37)
+  ["total-memory-bytes"]=>
+  int(1009128)
+  ["swap-usage-percentage"]=>
+  int(26)
+  ["total-swap-bytes"]=>
+  int(1048572)
+  ["mysql-server-running"]=>
+  bool(true)
+  ["apache-server-running"]=>
+  bool(false)
+  ["nginx-server-running"]=>
+  bool(true)
+  ["active-http-connections"]=>
+  int(0)
+  ["load-averages"]=>
+  array(3) {
+    [1]=>
+    float(0.13)
+    [5]=>
+    float(0.19)
+    [15]=>
+    float(0.13)
+  }
+  ["cpu-usage-percentage"]=>
+  float(6.2)
+}
+
+```