fix: ci errors

[Bug-Finderr]

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[Copilot]

Pull request overview

This PR addresses CI/linter errors by properly handling return values from functions that return errors. The changes ensure compliance with Go static analysis tools, particularly staticcheck warnings about unchecked errors and inefficient sync.Pool usage.

Changes:

• Modified buffer pool to use pointer to byte slice instead of byte slice directly, following staticcheck SA6002 recommendation to reduce allocations
• Added explicit error handling or intentional error discarding using blank identifiers for Close(), Write(), and TCP socket configuration operations
• Enhanced os.Setenv calls with error checking and warning logs

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
pkg/server/server.go	Fixed buffer pool pointer usage, added explicit error discarding for defer statements, TCP socket options, and connection Write operations
main.go	Added error checking for os.Setenv calls with warning messages

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