/files/ 下のヘッダ設定タイミングを修正 (#5650)

src/server/file/index.ts

@@ -12,19 +12,14 @@ import sendDriveFile from './send-drive-file';
 const app = new Koa();
 app.use(cors());
 
-app.use(async (ctx, next) => {
-	// Cache 365days
-	ctx.set('Cache-Control', 'max-age=31536000, immutable');
-	await next();
-});
-
 // Init router
 const router = new Router();
 
 router.get('/app-default.jpg', ctx => {
 	const file = fs.createReadStream(`${__dirname}/assets/dummy.png`);
-	ctx.set('Content-Type', 'image/jpeg');
 	ctx.body = file;
+	ctx.set('Content-Type', 'image/jpeg');
+	ctx.set('Cache-Control', 'max-age=31536000, immutable');
 });
 
 router.get('/:key', sendDriveFile);