Feat: add in logger.

src/main.rs

@@ -1,5 +1,6 @@
 use anyhow::{Context, Result};
 use clap::Parser;
+use log::info;
 
 // Search for a pattern in a file and display the lines that contain it.
 #[derive(Parser)]
@@ -9,6 +10,8 @@ struct Cli {
 }
 
 fn main() -> Result<()> {
+    env_logger::init();
+    info!("starting up");
     let args = Cli::parse();
 
     // let content = std::fs::read_to_string(&args.path).expect("Could not read file.");