Standalone postgres and lockfiles on ubuntu

[kswope]

pushy ubuntu wants postgres to put its lockfile in /var/run/postgres which causes problems when the instructions for this assignment call for running a local postgres. I think the author's OS allows postgres' lockfile to be in /tmp, which causes no friction.

> foreman start
FATAL:  could not create lock file "/var/run/postgresql/.s.PGSQL.6432.lock": Permission denied

Feeding postres a '-k' switch in the Procfile resolved the problem for me

web: bundle exec rails s -p 4000
pg: postgres -D pg_data -p 6432 -k /tmp