Manual Coolify Setup Guide for Unsupported Ubuntu Versions and Security-Hardened VPS

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Coolify's automatic installation script currently supports only Ubuntu 20.04, 22.04, and 24.04 LTS, leaving users on newer versions such as Ubuntu 26.04 without a working one-line install option. A manual setup process is available as an alternative, requiring a VPS with at least 2 CPU cores, 2 GB RAM, and 30 GB of free storage. The walkthrough covers prerequisites including SSH access, CURL, and Docker Engine installation, with steps to remove conflicting packages before adding Docker's official GPG key and repository. Because Coolify's own documentation assumes root account usage, this security-focused guide instead creates a dedicated sudo user with passwordless privileges after disabling root login. The guide is designed to follow on from earlier Ansible playbook configurations, continuing a series aimed at a security-first VPS deployment workflow.

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