How to fix the AWS code-build apt-get update exit status 100 for react application to upload on s3


I have reactJs application and using AWS s3 to deploy static site. I’ve setup AWS code build for CI/CD. I’m using bitbucket and when any PR merge to master branch Web-hook comes into picture to trigger react application build and upload build on s3.

It was working fine for last 2 years but in last build I got a below error.

W: GPG error: stable InRelease: The following signatures were invalid: EXPKEYSIG 23E7166788B63E1E Yarn Packaging
E: The repository ‘ stable InRelease’ is not signed.

[Container] 2021/02/04 07:39:02 Command did not exit successfully
apt-get update exit status 100 [Container] 2021/02/04 07:39:02 Phase
complete: INSTALL State: FAILED [Container] 2021/02/04 07:39:02 Phase
context status code: COMMAND_EXECUTION_ERROR Message: Error while
executing command: apt-get update. Reason: exit status 100

Here is the full log output.

enter image description here

here is the buildspec.yml file


The signing key it complains about on line 82, what happens when you install it before apt update? Like suggested here:

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