fix: use import assertion

.node-version

-v16.13.2
+v16.14.0

CHANGELOG.md

@@ -12,6 +12,9 @@ You should also include the user name that made the change.
 
 ## 12.x.x (unreleased)
 
+### NOTE
+このバージョンからNode v16.14.0以降が必要です
+
 ### Changes
 - ノートの最大文字数を設定できる機能が廃止され、デフォルトで一律3000文字になりました
 

Dockerfile

-FROM node:16.13.2-alpine3.15 AS base
+FROM node:16.14.0-alpine3.15 AS base
 
 ENV NODE_ENV=production
 

packages/backend/src/server/web/manifest.ts

 import Koa from 'koa';
-import * as manifest from './manifest.json';
+import * as manifest from './manifest.json' assert { type: 'json' };
 import { fetchMeta } from '@/misc/fetch-meta.js';
 
 export const manifestHandler = async (ctx: Koa.Context) => {