Maintenance pages are a neat way to inform your users that there are operational changes that require downtime. Cloudflare Workers allows you to execute Javascript and serve HTML close to your users and when Cloudflare manages your DNS it makes it easy to create a Worker and let it manage all traffic during a maintenance period. This makes a great solution for smaller teams/applications that do not want to invest time into creating and displaying maintenance pages. Terraform is a tool that enables provisioning infrastructure via code and it integrates great with Cloudflare APIs.