Correct answer - "define a .appspec file in the root directory" : An AppSpec file must be a
YAML-formatted file named appspec.yml and it must be placed in the root of the directory
structure of an application's source code. Otherwise, deployments fail.
Incorrect:
"define a .buildspec file in the root directory" - This is a file used by AWS CodeBuild to run a
build
"define a .buildspec file in the codebuild/ directory" - This is a file used by AWS CodeBuild to
run a build. In this example we are not working with CodeBuild
"define a .appspec file in the codebuild/ directory" - This file is for AWS CodeDeploy and must
be placed in the root of the directory structure of an application's source code