一番最初のdeploy実行時に下記エラーが出ることがあります。
$ cdk deploy --profile プロファイル名
Do you wish to deploy these changes (y/n)? y
CdkStack: deploying...
❌ CdkStack failed: Error: This stack uses assets, so the toolkit stack must be deployed to the environment (Run "cdk bootstrap aws://unknown-account/unknown-region")
at Object.addMetadataAssetsToManifest (/home/kazuma/.anyenv/envs/nodenv/versions/12.9.1/lib/node_modules/aws-cdk/lib/assets.ts:27:11)
at Object.deployStack (/home/kazuma/.anyenv/envs/nodenv/versions/12.9.1/lib/node_modules/aws-cdk/lib/api/deploy-stack.ts:208:29)
at processTicksAndRejections (internal/process/task_queues.js:85:5)
at CdkToolkit.deploy (/home/kazuma/.anyenv/envs/nodenv/versions/12.9.1/lib/node_modules/aws-cdk/lib/cdk-toolkit.ts:184:24)
at initCommandLine (/home/kazuma/.anyenv/envs/nodenv/versions/12.9.1/lib/node_modules/aws-cdk/bin/cdk.ts:213:9)
This stack uses assets, so the toolkit stack must be deployed to the environment (Run "cdk bootstrap aws://unknown-account/unknown-region")
bootstrapを実行して、S3バケットを作成して、再度deployを実行すればOKです。
$ cdk bootstrap --profile プロファイル名