Quick DNS Update Task

I need a quick DNS update to point a domain to my Hetzner Linux server. This may require minor server configuration fixes.

Requirements:
- Modify existing A records
- Possibly adjust server configuration

Ideal Skills and Experience:
- Experience with Hetzner and Linux servers
- Proficiency in DNS record management
- Ability to handle minor server configuration tasks

Temporary root access will be provided. Should be a fast task.