Procfile: use dashing start instead of unicorn
Procfile: use only port
Revert "Procfile: use only port"

Let's use just 127.0.0.1.

This reverts commit 0fbdc5ccf044241a047f24f39cf1cf71f15f3786.
Revert "Procfile: use dashing start instead of unicorn"

This reverts commit 5d5dd5f5788a357f76be41b4a108d60442d215d2.

One of those bad ideas...