feat: Add TencentOS Server support in distribution detection

[guoningzhang20]

Description

The NodeSource setup script (nsetup) fails to detect TencentOS Server as a supported RHEL-based distribution. This causes Node.js installation to fail entirely on TencentOS, which is a widely used Linux distribution on Tencent Cloud.

The root cause is that the script relies on /etc/redhat-release for RHEL-family detection, but TencentOS Server does not ship this file by default.

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"
  

• Note: /etc/redhat-release is NOT present by default
• Arch: x86_64 (also applies to aarch64)
• Package Manager: dnf (yum compatible)

Steps to Reproduce

# On a fresh TencentOS Server V4.4 instance:
curl -fsSL https://rpm.nodesource.com/setup_22.x | bash -

Result: Script exits with an error because it cannot determine the distribution.

Expected Behavior

TencentOS Server should be recognized as a RHEL/EL9-compatible distribution, and the NodeSource RPM repository should be configured successfully, allowing dnf install -y nodejs to work.

Actual Behavior

The setup script fails at distribution detection. The error occurs because:

1. TencentOS does not have /etc/redhat-release
2. ID_LIKE in /etc/os-release is "tencentos" instead of "rhel centos fedora"
3. The script has no fallback to check PLATFORM_ID="platform:el9" which clearly indicates EL9 compatibility

Workaround (manual)

# Create the missing file manually:
echo "TencentOS Server release 4.4" > /etc/redhat-release

# Then run the setup script again:
curl -fsSL https://rpm.nodesource.com/setup_22.x | bash -
dnf install -y nodejs

However, this workaround is fragile and should not be required.

Suggested Fix

Add TencentOS to the distribution detection logic. Possible approaches:

Option A: Add tencentos to the ID matching

# In the distribution detection section, add:
tencentos)
    # Treat as RHEL-family, use EL version from PLATFORM_ID
    ;;

Option B: Use PLATFORM_ID as fallback

# If /etc/redhat-release is absent, check PLATFORM_ID:
if [[ "$PLATFORM_ID" == platform:el* ]]; then
    # Extract EL version and proceed with RHEL repository
fi

Option B is more robust as it would automatically support other EL-compatible distributions too.

Additional Context

• TencentOS Server is a production Linux distribution maintained by Tencent Cloud, serving millions of instances
• It is fully compatible with the RHEL/CentOS ecosystem (EL9 based)
• Uses dnf package manager, supports RPM packages
• Official site: https://cloud.tencent.com/product/ts
• This issue was discovered during automated AI usability testing across Linux distributions