A company has a suite of applications that uses the MERN stack for the presentation tier and NGINX for the web tier. AWS CodeDeploy will be used to automate its application deployments. The DevOps team created a deployment group for their TEST environment and performed functional tests within the application. The team will set up additional deployment groups for STAGING and PROD environments later on. The current log level is configured within the NGINX settings, but the team wants to change this configuration dynamically when the deployment occurs. This will enable them to set different log level configurations depending on the deployment group without having a different application revision for each group. Which among the options below provides the LEAST management overhead and does not require different script versions for each deployment group?