save output to log file instead

Since the progress bar hides the output now.  Instead of destroying it,
send it to a log file instead so users who want to see it still can.

automated install/basic-install.sh

@@ -10,6 +10,8 @@
 # curl -L install.pi-hole.net | bash
 
 ######## VARIABLES #########
+instalLogLoc=/etc/pihole/install.log
+
 # Get the screen size in case we need a full-screen message and so we can display a dialog that is sized nicely
 screenSize=$(stty -a | tr \; \\012 | egrep 'rows|columns' | cut '-d ' -f3)
 
@@ -202,7 +204,7 @@ XXX
 EOF
 
 # Execute the command in the background (hidden from the user, not actually a background process)
-${commands[${echoes[$k]}]} > /dev/null 2>&1
+${commands[${echoes[$k]}]} > $instalLogLoc 2>&1
 done
 
 # As the loop is progressing, the output is sent to whiptail to be displayed to the user