Add command line argument parsing

src/main.rs

@@ -27,6 +27,7 @@ mod server;
 
 use std::path::Path;
 
+use clap::Parser;
 use color_eyre::Result;
 use config::Config;
 use tracing::{event, instrument, Level};
@@ -60,14 +61,21 @@ async fn load_config(path: &str) -> Result<Config> {
     Ok(toml::from_str(&content)?)
 }
 
+#[derive(Debug, Clone, Parser)]
+struct Args {
+    /// Path to the configuration file.
+    #[arg(short, long, default_value = "config.toml")]
+    config: String,
+}
+
 #[tokio::main]
 #[instrument]
 async fn main() -> Result<()> {
+    let args = Args::parse();
+
     init()?;
 
-    event!(Level::INFO, "Hello, world!");
-
-    let config = load_config("config.toml").await?;
+    let config = load_config(&args.config).await?;
 
     tokio::spawn(server::run()).await??;