Heroku can't find Django templates

Question

I'm getting a TemplateDoesNotExist error on Heroku when it looks for my html files. The files all sync up on the development server. The TEMPLATE_DIRS setting is set to:

TEMPLATE_DIRS = ['/Users/jonathanschen/Python/projects/skeleton/myportfolio/templates',]

But when trying to load the page the herokuapp page I get the following error: I think there's something very basic I'm missing here.

TemplateDoesNotExist at /
index.html
Request Method: GET
Request URL:    http://morning-coast-2859.herokuapp.com/
Django Version: 1.4.1
Exception Type: TemplateDoesNotExist
Exception Value:    
index.html
Exception Location: /app/.heroku/venv/lib/python2.7/site-packages/django/template/loader.py in find_template, line 138

Template-loader postmortem

Django tried loading these templates, in this order:
Using loader django.template.loaders.filesystem.Loader:
/Users/jonathanschen/Python/projects/skeleton/myportfolio/templates/index.html (File does not exist)
Using loader django.template.loaders.app_directories.Loader:
/app/.heroku/venv/lib/python2.7/site-packages/django/contrib/auth/templates/index.html (File does not exist)
/app/.heroku/venv/lib/python2.7/site-packages/django/contrib/admin/templates/index.html (File does not exist)