This list is focused on cloud services I use professionally (for my business), but I plan to migrate personal services as well (privately I also rely on WhatsApp for communication and iCloud for backups and notes). Docker Hub (a registry for Docker images) is essential to my CD pipeline; it stores the private images that my servers automatically pull to install new versions of my apps. Replacing Docker Hub required more research, mainly because I hadn't set up a custom Docker registry or persistent storage before – something I should have tackled ages ago.