Let info be a default level

src/main.rs

@@ -1,10 +1,20 @@
+use std::env;
+
 use clap;
-use log::{error, info};
+use log::{error, info, LevelFilter};
 use svtl::{get_base_url, get_content, get_relative_links, YtDlpWrapper};
 
+fn init_logger() {
+    let mut builder = env_logger::Builder::from_env("RUST_LOG");
+    if env::var("RUST_LOG").is_err() {
+        builder.filter_level(LevelFilter::Info);
+    }
+    builder.init();
+}
+
 #[tokio::main]
 async fn main() {
-    env_logger::init();
+    init_logger();
 
     let matches = clap::Command::new("Svt Links")
         .version("1.0")