修改readme

@@ -12,6 +12,7 @@ see [egg docs][egg] for more detail.
 
 ```bash
 $ npm i
+$ npm run init
 $ npm run dev
 $ open http://localhost:7001/
 ```
@@ -29,5 +30,43 @@ $ npm stop
 - Use `npm test` to run unit test.
 - Use `npm run autod` to auto detect dependencies upgrade, see [autod](https://www.npmjs.com/package/autod) for more detail.
 
+## 配置
+
+1. 必须提供mem_accounts.json文件在config下配置，该文件为json数组是区块链账户结构如下
+   ```
+  { "RECORDS": [
+    {
+      "username": "",
+      "is_delegate": "0",
+      "u_isdelegate": "0",
+      "second_signature": "0",
+      "u_second_signature": "0",
+      "u_username": "",
+      "address": "DC6exGCAR24euF8fhd9abfHKQk169udiCG",
+      "publicKey": "41b2d3beec35225152e3daa25a489c0fb1aceecdff977b4d5fdeb8ad9df95acc",
+      "second_public_key": "",
+      "balance": "-1000000000000000000",
+      "u_balance": "-1000000000000000000",
+      "vote": "0",
+      "rate": "0",
+      "delegates": "",
+      "u_delegates": "",
+      "multisignatures": "",
+      "u_multisignatures": "",
+      "multimin": "0",
+      "u_multimin": "0",
+      "multilifetime": "0",
+      "u_multilifetime": "0",
+      "block_id": "6b914799f1ca868d561ddc15e96fc12aedd7e82648c4779e366c9b2b7bbff70fceb9dc3e337d11aca7f5e3e79e116e108924e6fe5eb036145713500478843456",
+      "nameexist": "0",
+      "u_nameexist": "0",
+      "producedblocks": "1",
+      "missedblocks": "0",
+      "fees": "0",
+      "rewards": "0",
+      "lock_height": "0"
+    }]}
+   ```
+
 
 [egg]: https://eggjs.org
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