Change log timestamp format so fail2ban can parse it

src/main.rs

@@ -71,7 +71,7 @@ fn init_logging() -> Result<(), fern::InitError> {
     .format(|out, message, record| {
         out.finish(format_args!(
             "{}[{}][{}] {}",
-            chrono::Local::now().format("[%Y-%m-%d][%H:%M:%S]"),
+            chrono::Local::now().format("[%Y-%m-%d %H:%M:%S]"),
             record.target(),
             record.level(),
             message