P329でフロントエンド用のイメージからタスクが作成できない

[kawakami23]

題目の通りです。
git clone https://github.com/uma-arai/sbcntr-frontend.gitしてきてmainブランチでビルドし、イメージを作成しました。
ECRにPushし、タスクを実行しようとしたのですが、以下のようなエラーが吐かれタスクが実行されません。
何か解決策がありましたら、ご教授いただければ幸いです。

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[email protected] start:prd /app
npx blitz start --port 80
You are using beta software - if you have any problems, please open an issue here:
https://github.com/blitz-js/blitz/issues/new/choose
⚠️ Git doesn't seem to be installed. Get it here: https://git-scm.com/downloads.
[32mready[39m - started server on 0.0.0.0:80, url: http://localhost:80
�[36minfo�[39m - Loaded env from /app/.env
�[33mwarn�[39m - �[1mYou have enabled experimental feature(s).�[22m
�[33mwarn�[39m - Experimental features are not covered by semver, and may cause unexpected or broken application behavior. Use them at your own risk.
Error: Cannot find module '/app/.next/prerender-manifest.json'
Require stack:
'"- /app/node_modules/next/dist/next-server/server/next-server.js"
'"- /app/node_modules/next/dist/server/next.js"
'"- /app/node_modules/next/dist/server/lib/start-server.js"
'"- /app/node_modules/next/dist/cli/next-start.js"
'"- /app/node_modules/next/dist/bin/next"
at Function.Module._resolveFilename (internal/modules/cjs/loader.js:880:15)
at Function.mod._resolveFilename (/app/node_modules/next/dist/build/webpack/require-hook.js:4:1784)
at Function.Module._load (internal/modules/cjs/loader.js:725:27)
at Module.require (internal/modules/cjs/loader.js:952:19)
at require (internal/modules/cjs/helpers.js:88:18)
at Server.getPrerenderManifest (/app/node_modules/next/dist/next-server/server/next-server.js:36:318)
at Server.getPreviewProps (/app/node_modules/next/dist/next-server/server/next-server.js:36:461)
at new Server (/app/node_modules/next/dist/next-server/server/next-server.js:3:329)
at NextServer.createServer (/app/node_modules/next/dist/server/next.js:1:2745)
at /app/node_modules/next/dist/server/next.js:1:3143 {
code: 'MODULE_NOT_FOUND',
requireStack: [
'/app/node_modules/next/dist/next-server/server/next-server.js',
'/app/node_modules/next/dist/server/next.js',
'/app/node_modules/next/dist/server/lib/start-server.js',
'/app/node_modules/next/dist/cli/next-start.js',
'/app/node_modules/next/dist/bin/next'
]
}
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] start:prd: npx blitz start --port 80
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] start:prd script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

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