Build Command execution errors due to targetRegion and ECR_DN

[NxP4Code]

If we clone the repo and follow the steps mentioned in the document we get the following errors.

Get https://xxx.dkr.ecr.***.amazonaws.com.cn/v2/: dial tcp: lookup xxx.dkr.ecr.***.amazonaws.com.cn on 10.0.0.2:53: no such host 76 |   77 | [Container] 2024/02/15 02:17:39.123150 Command did not exit successfully echo "Hello, CodeBuild!, push to ${targetRegion}" 78 | bash ./mirror-images.sh 79 | exit status 1 80 | [Container] 2024/02/15 02:17:39.126557 Phase complete: BUILD State: FAILED 81 | [Container] 2024/02/15 02:17:39.126575 Phase context status code: COMMAND_EXECUTION_ERROR Message: Error while executing command: echo "Hello, CodeBuild!, push to ${targetRegion}"