replacing sqlite for pg
adding Gemfile.lock for heroku
satisfying Heroku slag compiler about assets precompilation
ordering
postgres migration
images
grouping sqlite/pg
displaying pdflatex compilation error to user
adding .buildpacks
removing tex
adding Procfile
port 4000
removing
restoring
swap
adding tex resoures
supporting files for pdflatex
refactoring error in the rescue statement