docs: unify config in quickstart (#1094)

.gitignore

@@ -21,4 +21,6 @@ docs/**/contributing.md
 docs/public
 docs/plugins.png
 
+package-lock.json
+yarn.lock
 !test/fixtures/apps/loader-plugin/node_modules

docs/source/en/basics/config.md

@@ -38,6 +38,16 @@ module.exports = {
   },
 };
 ```
+
+The configuration file can simplify to `exports.key = value` format
+
+```js
+exports.keys = 'my-cookie-secret-key';
+exports.logger = {
+  level: 'DEBUG',
+};
+```
+
 The configuration file can also return a function which could receive a parameter called `appInfo`
 
 ```js
@@ -75,7 +85,7 @@ Here is one sequence of loading configurations under "prod" environment, in whic
 	-> plugin config.prod.js
 	-> framework config.prod.js
 	-> application config.prod.js
-	
+
 **Note: there will be plugin loading sequence, but the approximate order is similar. For specific logic, please check the [loader](../advanced/loader.md) .**
 
 ### Merging rule

docs/source/en/intro/quickstart.md

@@ -90,11 +90,10 @@ module.exports = app => {
 };
 ```
 
-Then add a configuration file:
+Then add a [configuration](../basics/config.md) file:
 
 ```js
 // config/config.default.js
-// should change to your own keys
 exports.keys = <YOUR_SECURITY_COOKE_KEYS>;
 ```
 
@@ -174,18 +173,13 @@ exports.nunjucks = {
 
 ```js
 // config/config.default.js
-module.exports = appInfo => {
-  const config = {};
-  config.keys = <YOUR_SECURITY_COOKE_KEYS>;
-
-  // add config
-  config.view = {
-    defaultViewEngine: 'nunjucks',
-    mapping: {
-     '.tpl': 'nunjucks',
-    },
-  }
-  return config;
+exports.keys = <YOUR_SECURITY_COOKE_KEYS>;
+// add view's configurations
+exports.view = {
+  defaultViewEngine: 'nunjucks',
+  mapping: {
+    '.tpl': 'nunjucks',
+  },
 };
 ```
 
@@ -308,6 +302,7 @@ And also add config.
 
 ```js
 // config/config.default.js
+// add news' configurations
 exports.news = {
   pageSize: 5,
   serverUrl: 'https://hacker-news.firebaseio.com/v0',
@@ -367,11 +362,11 @@ module.exports = (options, app) => {
 };
 
 // config/config.default.js
-// mount middleware
+// add middleware robot
 exports.middleware = [
   'robot'
 ];
-// middleware config
+// robot's configurations
 exports.robot = {
   ua: [
     /Baiduspider/i,

docs/source/zh-cn/basics/config.md

@@ -41,6 +41,15 @@ module.exports = {
 };
 ```
 
+配置文件也可以简化的写成 `exports.key = value` 形式
+
+```js
+exports.keys = 'my-cookie-secret-key';
+exports.logger = {
+  level: 'DEBUG',
+};
+```
+
 配置文件也可以返回一个 function，可以接受 appInfo 参数
 
 ```js

docs/source/zh-cn/intro/quickstart.md

@@ -84,11 +84,10 @@ module.exports = app => {
 };
 ```
 
-加一个配置文件：
+加一个[配置文件](../basics/config.md)：
 
 ```js
 // config/config.default.js
-// 切记：要改为自己的 key 值
 exports.keys = <此处改为你自己的 Cookie 安全字符串>;
 ```
 
@@ -162,18 +161,13 @@ exports.nunjucks = {
 
 ```js
 // config/config.default.js
-module.exports = appInfo => {
-  const config = {};
-  config.keys = <此处改为你自己的 Cookie 安全字符串>;
-
-  // 添加配置
-  config.view = {
-    defaultViewEngine: 'nunjucks',
-    mapping: {
-      '.tpl': 'nunjucks',
-    },
-  }
-  return config;
+exports.keys = <此处改为你自己的 Cookie 安全字符串>;
+// 添加 view 配置
+exports.view = {
+  defaultViewEngine: 'nunjucks',
+  mapping: {
+    '.tpl': 'nunjucks',
+  },
 };
 ```
 
@@ -289,6 +283,7 @@ module.exports = app => {
 
 ```js
 // config/config.default.js
+// 添加 news 的配置项
 exports.news = {
   pageSize: 5,
   serverUrl: 'https://hacker-news.firebaseio.com/v0',
@@ -341,11 +336,11 @@ module.exports = (options, app) => {
 };
 
 // config/config.default.js
-// mount middleware
+// add middleware robot
 exports.middleware = [
   'robot'
 ];
-// middleware config
+// robot's configurations
 exports.robot = {
   ua: [
     /Baiduspider/i,