Koyeb has launched its Terraform Provider, becoming a HashiCorp Technology Partner, to enable developers to manage Koyeb resources such as apps, services, domains, and secrets more efficiently using Terraform's infrastructure-as-code capabilities. The provider complements Koyeb's existing tools like CLI, SDKs, and API, allowing users to track changes and deploy applications with custom domains globally. The guide details the installation of Terraform and the Koyeb provider, configuration of API access tokens, and deployment of a sample Golang application using Terraform scripts. It also explains how to integrate Cloudflare for DNS management and customize domain configurations, illustrating the process through Terraform's plan and apply commands. Users are encouraged to sign up for Koyeb to explore these features further, with incentives such as free credits available for new signups.