Load galleria and associated js in custom template.php file

I have galleria working just fine in a .html file. I have tried replicating the experience on a custom template file(coz where’s the fun in html files) for the photography pages on my website. Now, the jquery/javascript links don’t seem to be working coz the stuff isn’t loading ??

Here’s the page
https://www.jeffwaweru.com/photography/

After failing to load using:
<?php bloginfo('template_directory'); ?>
I tried using absolute paths like so:
https://www.jeffwaweru.com/js/galleria/galleria-1.2.7.js

but both methods fail to load the ‘js’ stuff.

Can you see what I’m doing wrong?
Thanks, much appreciated