How To: Install Calibre Web on a Cloud Provider - janeczku/calibre-web GitHub Wiki
Some hosting platforms provide specific documentation about Calibre Web installation, or in some case a wizard for quick installation.
alwaysdata
alwaysdata is a Platform-as-a-Service (PaaS) providing Public and Private Cloud offers. Starting with a free plan they provide MySQL/PostgreSQL databases, emails, free SSL certificates, included backups, etc.
Install Calibre-Web from Marketplace
Cloudron
Cloudron is a solution for self-hosting apps on a cloud server with one-click installs.
Install Calibre-Web from Cloudron Store
Yunohost
Yunohost is an operating system for self-hosting of applications on many kinds of hardware.