The text discusses the migration process from Heroku to Google Kubernetes Engine (GKE) for a web crawler prototype. As the product matured and customer expectations grew, the team needed more robustness and fine-grained control over their infrastructure, leading them to choose Kubernetes. However, the migration was not straightforward and involved several challenges such as setting up environment variables, managing secrets, enabling HTTPS/SSL access, and migrating from a self-managed PostgreSQL database to Google CloudSQL. Despite these challenges, the team is satisfied with the benefits brought by the migration, including better control over infrastructure, scalability, and improved security features.