docs(readme): update readme

Makefile

@@ -32,3 +32,5 @@ ready-for-data:
 
 clean:
 	rm admin_test.db
+
+.PHONY: all serve build generate test black-box-test user-acceptance-test ready-for-data clean

adm_config.ini

@@ -1,3 +1,4 @@
+; default database config 默认数据库配置
 [database]
 driver = sqlite
 file = ./admin.db
@@ -5,6 +6,11 @@ database = goadmin
 ; Here are new tables to generate. 新的待转换的表格
 tables = new_table1,new_table2
 
+; specified connection database config 指定数据库配置
+; for example, database config which connection name is mydb.
+;[database.mydb]
+
+; table model config 数据模型设置
 [model]
 package = main
 connection = default