feat: Add TencentOS Server to supported distributions

In install.sh, start at the distribution detection logic and reproduce the reported curl command on TencentOS Server V4.4. Confirm that ID=tencentos reaches the CentOS/RHEL-compatible installation path and that Docker CE installation completes; done means the convenience script recognizes TencentOS and installs Docker successfully.

Description

The Docker convenience install script (get.docker.com) does not recognize TencentOS Server as a supported distribution. When running the script on TencentOS, it fails at the distribution detection stage because ID=tencentos is not in the list of recognized distributions.

Environment

• OS: TencentOS Server V4.4
• /etc/os-release (key fields):

  NAME="TencentOS Server"
  VERSION="4.4"
  ID=tencentos
  ID_LIKE="tencentos"
  VERSION_ID="4.4"
  PLATFORM_ID="platform:el9"
  

• Arch: x86_64
• Package Manager: dnf (yum compatible)

Steps to Reproduce

# On a fresh TencentOS Server V4.4 instance:
curl -fsSL https://get.docker.com | sh

The script fails because it cannot identify TencentOS as a supported distribution for Docker CE installation.

Expected Behavior

TencentOS Server should be detected as a RHEL/CentOS-compatible distribution, and Docker CE should be installed using the CentOS/RHEL repository.

Actual Behavior

The install script does not recognize ID=tencentos and exits without installing Docker.

Workaround

Manual installation works fine:

dnf config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
dnf install -y docker-ce docker-ce-cli containerd.io docker-compose-plugin
systemctl enable --now docker

This confirms TencentOS is fully compatible with the CentOS Docker repository — it's purely a detection issue in the convenience script.

Suggested Fix

Add tencentos to the distribution detection in install.sh, mapping it to use the CentOS repository:

tencentos)
    # TencentOS Server is RHEL/CentOS compatible
    $sh_c "dnf config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo"
    $sh_c "dnf install -y docker-ce docker-ce-cli containerd.io docker-compose-plugin"
    ;;

Or more robustly, check PLATFORM_ID for platform:el* to cover all EL-compatible distributions.

Additional Context

• TencentOS Server is a production Linux distribution maintained by Tencent Cloud, serving millions of instances
• Fully compatible with RHEL/CentOS ecosystem (EL9 based), uses dnf, supports RPM
• The CentOS Docker repository works perfectly on TencentOS — only the convenience script detection is missing
• Official site: https://cloud.tencent.com/product/ts
• This issue was discovered during automated AI usability testing across Linux distributions