[ci skip] update google doc.

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

doc.go

@@ -11,6 +11,9 @@
 // Support Web API to send push notification.
 // Support zero downtime restarts for go servers using endless.
 // Support HTTP/2 or HTTP/1.1 protocol.
+// Support notification queue and multiple workers.
+// Support /api/stat/app show notification success and failure counts.
+// Support /api/config show your yml config.
 //
 // The pre-compiled binaries can be downloaded from release page.
 //
@@ -26,6 +29,45 @@
 //
 //   $ gorush -ios -m="your message" -i="API Key" -t="Device token" -production
 //
+// Run gorush web server
+//
+//   $ gorush -c config.yml
+//
+// Get go status of api server using httpie tool:
+//
+//   $ http -v --verify=no --json GET https://localhost:8088/api/stat/go
+//
+// Gorush support the following API.
+//
+// GET /api/stat/go Golang cpu, memory, gc, etc information. Thanks for golang-stats-api-handler.
+// GET /api/stat/app show notification success and failure counts.
+// GET /api/config show server yml config file.
+// POST /api/push push ios and android notifications.
+//
+// Simple send iOS notification example, the platform value is 1:
+//
+//   {
+//     "notifications": [
+//       {
+//         "tokens": ["token_a", "token_b"],
+//         "platform": 1,
+//         "message": "Hello World iOS!"
+//       }
+//     ]
+//   }
+//
+// Simple send Android notification example, the platform value is 2:
+//
+//   {
+//     "notifications": [
+//       {
+//         "tokens": ["token_a", "token_b"],
+//         "platform": 2,
+//         "message": "Hello World Android!"
+//       }
+//     ]
+//   }
+//
 // For more details, see the documentation and example.
 //
 package main