Custom domains support for hosting

[jelveh]

Currently, websites hosted on Puter are only accessible via *.puter.site subdomains. Adding support for custom domains would allow users to use their own domain names for their hosted websites, making Puter a more complete hosting solution.

Proposed Features

• Allow users to add custom domains in the hosting settings
• Provide clear instructions for setting up DNS records (A record, CNAME)
• SSL/TLS certificate management for custom domains
• Validation system to verify domain ownership
• UI in "My Websites" section to manage custom domain mappings
• API endpoints to programmatically manage custom domains

Technical Considerations

• DNS verification system to ensure users own the domains they're adding
• Integration with Let's Encrypt or similar service for SSL certificates
• Handle both apex domains and subdomains
• Proper error handling for DNS misconfigurations
• Rate limiting for domain additions
• Storage of domain mappings in the backend

User Experience

1. User navigates to "My Websites"
2. Clicks "Add Custom Domain" for a specific website
3. Enters their domain name
4. System provides DNS configuration instructions
5. User configures their DNS
6. System validates the DNS configuration
7. Once validated, the website becomes available on the custom domain

Implementation Details

• Add domain management UI to the websites section
• Create backend endpoints for domain management
• Implement domain verification system
• Set up automated SSL certificate provisioning
• Add domain routing logic to the hosting infrastructure