[BUG] Hauler fileserve fails on large files due to hardcoded 15 second timeout.

[atoy3731]

Environmental Info:

Linux REDACTED 4.4.302+ #69057 SMP Fri Jan 12 17:02:27 CST 2024 x86_64 GNU/Linux synology_v1000_1821+

Hauler Version:

GitVersion:    1.0.3
GitCommit:     f7c24f6
GitTreeState:  clean
BuildDate:     2024-04-24T16:50:33Z
GoVersion:     go1.21.9
Compiler:      gc
Platform:      linux/amd64

Describe the Bug:

• When trying to pull a large file from the fileserver, the hardcoded timeout can affect the ability to pull that artifact.

See: https://github.com/rancherfederal/hauler/blob/main/internal/server/file.go#L36-L37

Steps to Reproduce:

• For me, I was utilizing hauler store serve fileserver to serve the Harvester ISO for PXE booting (5.6Gi in size).
• When pointing Harvester PXE boot to Hauler, the download of the ISO continuously fails at 15 seconds due to the timeout.

Expected Behavior:

One of two options:

• The timeout is configurable.
• The timeout is set to a higher amount than 15 seconds. Perhaps 60 or 120.

Actual Behavior:

• See above.

Additional Context:

• N/A