add support for config migration

packages/hydrooj/src/service/monitor.ts

@@ -39,7 +39,7 @@ export async function feedback(): Promise<[string, StatusUpdate]> {
         problemCount,
         discussionCount,
         recordCount,
-        addons: global.addons,
+        addons: Object.values(global.addons),
         memory: inf.memory,
         osinfo: inf.osinfo,
         cpu: inf.cpu,

packages/hydrooj/src/service/server.ts

@@ -106,7 +106,7 @@ export async function apply(ctx: Context) {
             }
         });
 
-        for (const addon of [...global.addons].reverse()) {
+        for (const addon of [...Object.values(global.addons)].reverse()) {
             const dir = resolve(addon, 'public');
             if (!fs.existsSync(dir)) continue;
             server.addServerLayer(`${addon}_public`, cache(dir, {