1. add response message

2. add account schema

schema/20180815-1.sql

@@ -0,0 +1,8 @@
+CREATE TABLE public.account
+(
+    id uuid DEFAULT public.uuid_generate_v4() PRIMARY KEY NOT NULL,
+    account varchar(100) NOT NULL,
+    password varchar(200) NOT NULL,
+    ctime timestamp with time zone DEFAULT current_timestamp NOT NULL,
+    mtime timestamp with time zone DEFAULT current_timestamp NOT NULL
+);