v1.0.0 — Initial stable release

First stable release. Provisions a fresh Ubuntu LTS cloud instance with a single
paste into your CSP's user-data field.

What it does

• Creates a sudo user and migrates SSH keys from /root/.ssh/authorized_keys
• Disables root SSH login and password authentication (public-key only)
• Installs Docker Engine and the Docker Compose plugin from Docker's official apt repo
• Enables unattended-upgrades for automatic security patches

Usage

Paste the contents of bootstrap.sh
into your CSP's user-data field when creating the instance. Customize USERNAME
or SSH_PORT at the top of the script if needed.

To pin to this release (recommended for production over the moving main
target), use this URL in your bootstrap:
https://raw.githubusercontent.com/sjy5386/cloud-startup-script/refs/tags/v1.0.0/setup.sh

Supported

• Ubuntu 22.04 LTS / 24.04 LTS / 26.04 LTS
• Any CSP whose user-data runs as root (AWS, GCP, Oracle, Vultr, DigitalOcean,
  Linode, etc.)
• Works on cloud images with or without curl pre-installed — the bootstrap
  installs it on demand.

Design notes

• SSH hardening runs as the last step, so any earlier failure leaves the
  existing root SSH path intact (no lockout).
• Aborts early if /root/.ssh/authorized_keys is empty or missing.
• Idempotent: re-running on an instance is safe.

Full changelog: https://github.com/sjy5386/cloud-startup-script/commits/v1.0.0