Correct answer - "define a .buildspec file in the root directory" : A build spec is a collection
of build commands and related settings, in YAML format, that AWS CodeBuild uses to run a build.
You can include a build spec as part of the source code or you can define a build spec when you
create a build project.
"define a .appspec file in the root directory" - The AppSpec file is use for deployment in the
CodeDeploy service
"define a .buildspec file in the codebuild/ directory" - The file is correct but must be in the
root directory
"define a .appspec file in the codebuild/ directory" - The AppSpec file is use for deployment in
the CodeDeploy service