完成deno后端测试用的接口

back-end/utils.ts

@@ -0,0 +1,9 @@
+import { createDefine } from "fresh";
+
+// This specifies the type of "ctx.state" which is used to share
+// data among middlewares, layouts and routes.
+export interface State {
+  shared: string;
+}
+
+export const define = createDefine<State>();