添加更多配置文件设置，实现了一个api，完成部分文件的部分测试

src/config.js

@@ -1,7 +1,8 @@
+const defaultPrehandler = async function (req, rep) { }
+
 export const config = {
     database: {
-        url: 'mongodb://localhost:27017',
-        db: 'yggdrasil'
+        url: 'mongodb://localhost:27017/yggdrasil?readPreference=primary&appname=MongoDB%20Compass&directConnection=true&ssl=false',
     },
     server: {
         port: 3000,
@@ -10,5 +11,13 @@ export const config = {
     signing: {
         public: '/path/to/public.pem',
         private: '/path/to/private.key'
+    },
+    custom: {
+        overridePrehandler: (url) => {
+            return defaultPrehandler
+        },
+        preHooks: (fastify) => {},
+        preRouting: (fastify) => {},
+        postRouting: (fastify) => {},
     }
-}
+}