Install the neotree package

init.el

@@ -1094,6 +1094,16 @@ INFO plist."
 
 (use-package undo-tree)
 
+(use-package all-the-icons)
+
+(use-package neotree
+  :after
+  all-the-icons
+  :config
+  (setq neo-theme (if (display-graphic-p) 'icons 'arrow))
+  :bind
+  (("<f5>" . neotree-toggle)))
+
 ;; open pdf with system pdf viewer (works on mac)
 (setq bibtex-completion-pdf-open-function
   (lambda (fpath)