add update.sh

update.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+cd ~/.dotfiles
+git fetch
+
+if [ $(git rev-parse HEAD) == $(git rev-parse @{u}) ]; 
+then
+        read -p "Dotfiles can be updated. Do you want to proceed? (y/n)" choice
+        case "$choice" in
+            y|Y ) echo "updating..." && git pull >> /dev/null && echo "updated";;
+            * ) echo "skipping";;
+        esac
+fi;