Unable to build aws/codebuild/golang/1.11 noninteractively

[lisp-ceo]

While trying to build aws/codebuild/golang/1.11, add-apt-repository command asks for confirmation. As such, we're unable to build the container noninteractively. https://gist.github.com/lisp-ceo/c7d2a46b589ca3a01664f8b64d0b39dc

Steps to reproduce:

• git clone git@github.com:aws/aws-codebuild-docker-images.git
• cd ./aws-codebuild-docker-images/ubuntu/golang/1.11 && docker build -t aws/codebuild/golang/1.11 .

Gets the following output https://gist.github.com/lisp-ceo/c7d2a46b589ca3a01664f8b64d0b39dc
By adding the -y flag to add-apt-repository, the build proceeds. Would also like to see us add the env var DEBIAN_FRONTEND=noninteractivebut just adding the -y flag is enough.

Successful build: https://gist.github.com/lisp-ceo/1b713156d72d7cbd7b2ebee890043f98

[subinataws]

Merged. Thanks for the contribution.