<do not review> feat: test pipeline

ci/codebuild/Dockerfile

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+FROM scratch
+ADD sample_artifact .

ci/codebuild/sample_artifact

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+this is the built artifact

ci/codebuild/test.yml

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+version: 0.2
+
+phases:
+  pre_build:
+    commands:
+      - echo Logging in to Amazon ECR...
+      - aws ecr get-login-password --region $AWS_REGION | docker login --username AWS --password-stdin $AWS_ACCOUNT_ID.dkr.ecr.$AWS_REGION.amazonaws.com
+  build:
+    commands:
+      - echo Build started on `date`
+      - export DOCKER_IMAGE_NAME="$AWS_ACCOUNT_ID.dkr.ecr.$AWS_REGION.amazonaws.com/$IMAGE_REPO_NAME:${CODEBUILD_WEBHOOK_TRIGGER//\//-}"
+      - echo Image name is $DOCKER_IMAGE_NAME
+      - cd $CODEBUILD_SRC_DIR/ci/codebuild
+      - docker build -t $DOCKER_IMAGE_NAME .
+  post_build:
+    commands:
+      - echo Build completed on `date`
+      - echo Pushing the Docker image
+      - docker push $DOCKER_IMAGE_NAME