CDK Deploy Error - invalid signature

[kennycason]

Our team was trying to setup Airflow through the following steps via CDK:

https://aws.amazon.com/blogs/containers/running-airflow-on-aws-fargate/

However, during the cdk deploy step, and after answering "yes" to the prompt, we are encountering the following error:

#5 [2/7] RUN apt-get update && apt-get install -y python3-pip     libcurl4-gnutls-dev     librtmp-dev     python3-dev     libpq-dev
#5 sha256:787088182aea3ef729295dade2fab650429db33d33b8265ed2abda11ad49abff
#5 0.327 + apt-get update
#5 0.568 Get:1 http://security.debian.org/debian-security buster/updates InRelease [34.8 kB]
#5 0.580 Get:2 http://deb.debian.org/debian buster InRelease [122 kB]
#5 0.633 Get:3 http://deb.debian.org/debian buster-updates InRelease [56.6 kB]
#5 0.715 Get:4 http://repo.mysql.com/apt/debian stretch InRelease [21.6 kB]
#5 0.769 Get:5 http://security.debian.org/debian-security buster/updates/main amd64 Packages [508 kB]
#5 0.916 Get:6 http://deb.debian.org/debian buster/main amd64 Packages [7909 kB]
#5 1.216 Get:7 http://deb.debian.org/debian buster-updates/main amd64 Packages [8788 B]
#5 1.227 Err:4 http://repo.mysql.com/apt/debian stretch InRelease
#5 1.227   The following signatures were invalid: EXPKEYSIG 8C718D3B5072E1F5 MySQL Release Engineering <[email protected]>
#5 2.403 Reading package lists...
#5 3.271 W: GPG error: http://repo.mysql.com/apt/debian stretch InRelease: The following signatures were invalid: EXPKEYSIG 8C718D3B5072E1F5 MySQL Release Engineering <[email protected]>
#5 3.271 E: The repository 'http://repo.mysql.com/apt/debian stretch InRelease' is not signed.
#5 ERROR: executor failed running [/bin/bash -o pipefail -e -u -x -c apt-get update && apt-get install -y python3-pip     libcurl4-gnutls-dev     librtmp-dev     python3-dev     libpq-dev]: exit code: 100
------
executor failed running [/bin/bash -o pipefail -e -u -x -c apt-get update && apt-get install -y python3-pip     libcurl4-gnutls-dev     librtmp-dev     python3-dev     libpq-dev]: exit code: 100

 ❌  FarFlow failed: Error: Failed to publish one or more assets. See the error messages above for more information.
    at publishAssets (/Users/<REDACTED>/.nvm/versions/node/v16.14.2/lib/node_modules/aws-cdk/lib/index.js:391:74837)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)
    at async deployStack (/Users/<REDACTED>/.nvm/versions/node/v16.14.2/lib/node_modules/aws-cdk/lib/index.js:393:390)
    at async Object.deployStack2 [as deployStack] (/Users/<REDACTED>/.nvm/versions/node/v16.14.2/lib/node_modules/aws-cdk/lib/index.js:400:149977)
    at async /Users/<REDACTED>/.nvm/versions/node/v16.14.2/lib/node_modules/aws-cdk/lib/index.js:400:135508

Do you have any insight as to how to solve this problem? Thanks!