AWS: amplify pushしたら、エラーNo definition availableが出るとき

AWS Amplifyでdocker-composeを使ってバックエンドサーバを利用するときに、amplify pushでエラーが出たので、その時の対処法を備忘録として書いておきます。

エラーの内容

amplify pushすると、下記のエラーが出る

No definition available (docker-compose.yaml / docker-compose.yml / Dockerfile)

% amplify push
&#x2714; Successfully pulled backend environment dev from the cloud.

    Current Environment: dev

┌──────────┬────────────────────────┬───────────┬───────────────────┐
│ Category │ Resource name          │ Operation │ Provider plugin   │
├──────────┼────────────────────────┼───────────┼───────────────────┤
│ Api      │ container9999999999999 │ Create    │ awscloudformation │
└──────────┴────────────────────────┴───────────┴───────────────────┘
? Are you sure you want to continue? Yes
 An error occurred when pushing the resources to the cloud
 An error occurred during the push operation: /
No definition available (docker-compose.yaml / docker-compose.yml / Dockerfile)
 Review the Amplify CLI troubleshooting guide for potential next steps: https://docs.amplify.aws/cli/project/troubleshooting/