fix #21

[xzyaoi]

No description provided.

[xzyaoi]

@copilot review this PR.

[Copilot]

@xzyaoi I've opened a new pull request, #23, to work on those changes. Once the pull request is ready, I'll request review from you.

[Copilot]

Pull request overview

This PR appears to address issue #21 by improving runtime configuration of logging and slightly adjusting operational behavior/log verbosity in the P2P/protocol layer.

Changes:

• Add common.InitLogger() to allow logger re-initialization after Viper config/env is loaded, with more flexible loglevel parsing.
• Adjust protocol startup/error handling and reduce periodic connection summary logging from Info to Debug.
• Update dependencies (notably testify) and add an initial README.md.

Reviewed changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/internal/protocol/host.go	Replaces panics with logging + os.Exit(1) during P2P host initialization.
src/internal/protocol/clock.go	Lowers connection summary log level from Info to Debug.
src/internal/common/logger.go	Introduces InitLogger() and enhances log level configuration parsing.
src/entry/cmd/root.go	Enables Viper env support and re-initializes logger after config setup.
src/go.mod	Bumps testify and adds indirect deps.
src/go.sum	Updates dependency checksums accordingly.
README.md	Adds initial project description.

Comments suppressed due to low confidence (1)

src/internal/common/logger.go:43

• zapLogger.Sync() is no longer called anywhere (the only call site is commented out). Without syncing on shutdown, buffered logs can be lost. Consider returning the built *zap.Logger (or exposing a SyncLogger()), and calling Sync() from main()/shutdown handling rather than in init().

	zapLogger, err := config.Build()
	// defer func() { _ = zapLogger.Sync() }()
	if err != nil {
		panic(err)
	}
	Logger = zapLogger.Sugar()
}

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[Copilot]

host, err := newHost(...) is used (via host.ID().String()) before checking err. If newHost returns a nil host on error, this will panic before the error is logged/handled. Move the err check immediately after newHost and only set MyID/P2PNode when err == nil.

[xzyaoi]

@copilot open a new pull request to apply changes based on this feedback

[Copilot]

@xzyaoi I've opened a new pull request, #24, to work on those changes. Once the pull request is ready, I'll request review from you.