Add a Configuration File

[she3o]

Feature Overview

Introduce a configuration file to allow users to set server options without relying solely on command-line arguments.

Requirements

• Support configuration files in TOML.
• Allow users to specify the path to the configuration file via command-line arguments or default locations.
• Give precedence to command-line inputs.
• Validate configuration file contents: Provide meaningful error messages for invalid configs.

Acceptance Criteria

• Users can create a configuration file to set server parameters like host, port, directory, logging options, backup settings, etc.
• The server correctly reads and applies settings from the configuration file.
• Documentation is provided on the configuration file structure and options.
• A default configuration file.

Implementation Suggestions

• Use crates like config or serde to parse and manage configuration files.
• Default config locations on Linux: /etc/zync.toml, $HOME/.zync.toml and $CONFIG/zync/config.toml