Snorby Install

[jrpayne30040]

I have an Ubuntu 16.04 box on which I have installed Snort and I am trying to use Snorby as a graphical interface for it because I am in no wise a Linux or Snort guru. I have been following the install instructions found on this page (https://github.com/bensooter/Snort16OnUbuntu) and everything seems to go well until the section about two thirds down that contains the command to change to the snorby directory and then run "sudo bundle install". I have tried everything I know to do to get this to complete and it will not. Instead I end up with something like this:
Could not find PostgreSQL build environment (libraries & headers): Makefile not created

To see why this extension failed to compile, please check the mkmf.log which can be found here:

/var/lib/gems/2.3.0/extensions/x86_64-linux/2.3.0/do_postgres-0.10.16/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in /var/lib/gems/2.3.0/gems/do_postgres-0.10.16 for inspection.
Results logged to /var/lib/gems/2.3.0/extensions/x86_64-linux/2.3.0/do_postgres-0.10.16/gem_make.out
I am really scratching my head at this now and am hoping someone here has seen this before and will know where to go from here maybe.
Thank you in advance.