添加站内消息，修复讨论节点丢失的问题

hydro/development.js

@@ -9,46 +9,7 @@ process.stdin.on('data', async (input) => {
     }
 });
 
-global.Hydro = {
-    handler: {},
-    template: {},
-};
-
-require('./lib/i18n');
-require('./utils');
-
-const bus = require('./service/bus');
-const loader = require('./lib/loader');
-
-async function run() {
-    await loader.prepare();
-    await new Promise((resolve) => {
-        const h = () => {
-            console.log('Database connected');
-            bus.unsubscribe(['system_database_connected'], h);
-            resolve();
-        };
-        bus.subscribe(['system_database_connected'], h);
-        require('./service/db');
-    });
-    require('./service/gridfs');
-    require('./service/queue');
-    const server = require('./service/server');
-    const builtinHandler = [
-        'home', 'problem', 'record', 'judge', 'user',
-        'contest', 'training', 'discussion', 'manage', 'import',
-    ];
-    for (const i of builtinHandler) require(`./handler/${i}`);
-    await loader.model();
-    await loader.handler();
-    for (const i in global.Hydro.handler) {
-        await global.Hydro.handler[i].apply();
-    }
-    const notfound = require('./handler/notfound');
-    await notfound.apply();
-    server.start();
-}
-run().catch((e) => {
+require('./loader')().catch((e) => {
     console.error(e);
     process.exit(1);
 });