CasaOS Installer Fails to Download Gateway from Aliyun OSS

[BetterLuke]

Bug Report: CasaOS Installer Fails to Download Gateway from Aliyun OSS

Description
The CasaOS installer fails to download the linux-arm64-casaos-gateway-v0.4.9-alpha4.tar.gz package from Aliyun OSS during installation, returning a [FAILED] error. This blocks completion of the installation process.

Reproduction Steps

1. Run the official CasaOS installation command:

   curl -fsSL https://get.casaos.io | bash

2. Observe the download failure when the installer attempts to fetch:
   https://casaos.oss-cn-shanghai.aliyuncs.com/IceWhaleTech/CasaOS-Gateway/releases/download/v0.4.9-alpha4/linux-arm64-casaos-gateway-v0.4.9-alpha4.tar.gz

Expected Behavior
The installer should either:
• Successfully download from Aliyun OSS, or
• Fall back to an alternative mirror (e.g., GitHub Releases) if the primary source is unavailable.

Error Evidence
Installation log snippet:

[ INFO ] Downloading https://casaos.oss-cn-shanghai.aliyuncs.com/.../linux-arm64-casaos-gateway-v0.4.9-alpha4.tar.gz...
[FAILED] Failed to download package

Debugging Information

1. Manual download test (fails):

   curl -I https://casaos.oss-cn-shanghai.aliyuncs.com/.../linux-arm64-casaos-gateway-v0.4.9-alpha4.tar.gz
   # Returns: HTTP/2 403 (or timeout)

2. Successful download test from GitHub:

   wget https://github.com/IceWhaleTech/CasaOS-Gateway/releases/download/v0.4.9-alpha4/linux-arm64-casaos-gateway-v0.4.9-alpha4.tar.gz
   # Downloads successfully

Suggested Fixes

1. Add GitHub Releases as a fallback mirror.
2. Verify Aliyun OSS bucket permissions/availability.
3. Update installation scripts to handle download failures gracefully.

System Info
• Affected Architecture: arm64
• Installer Version: v0.4.9-alpha4
• Observed in: Raspberry Pi OS, Ubuntu Server (arm64)

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This version:
✔️ Focuses exclusively on the OSS download issue
✔️ Provides verifiable failure/success cases
✔️ Suggests actionable solutions
✔️ Omits unrelated details (e.g., UID warnings)

Submit this to: CasaOS GitHub Issues with labels bug and arm64.