Portainer is an application management tool with an intuitive and easy-to-use interface
For domains previously connected to CloudFlare, you can quickly create additional SUBDOMAIN for the domain by duplicating the Container you just created.
CloudFlare is a domain name management party and customers transfer domain names to Cloudflare for management
Step 1: To get the Global API Key, log in to Cloudflare then go to My Profile
Step 2: Here, select the tab API Tokens and scroll down and click on the View button in the section Global API Key