Install the neotree package

customizations.el

@@ -30,6 +30,7 @@
      achievements
      ag
      alert
+     all-the-icons
      anaconda-mode
      anzu
      ascii-art-to-unicode
@@ -122,6 +123,7 @@
      mc-extras
      mediawiki
      multiple-cursors
+     neotree
      ng2-mode
      nyan-mode
      nyan-prompt

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)