[Swagger]Add /meta

src/api/endpoints/meta.js

@@ -5,6 +5,33 @@
  */
 import Git from 'nodegit';
 
+/**
+ * @swagger
+ * /meta:
+ *   post:
+ *     summary: Show the misskey's information
+ *     responses:
+ *       200:
+ *         description: Success
+ *         schema:
+ *           type: object
+ *           properties:
+ *             maintainer:
+ *               description: maintainer's name
+ *               type: string
+ *             commit:
+ *               description: latest commit's hash
+ *               type: string
+ *             secure: 
+ *               description: whether the server supports secure protcols
+ *               type: boolean
+ *               
+ *       default:
+ *         description: Failed
+ *         schema:
+ *           $ref: "#/definitions/Error"
+ */
+
 /**
  * Show core info
  *