Merge pull request #408 from laurrentt/patch-1

doc(configuring-postgres): fix typo (of -> or)

Author: Matthew Fisher

src/installing-workflow/configuring-postgres.md

@@ -2,7 +2,7 @@
 
 Deis Workflow's controller component relies on a PostgreSQL database to store platform state.
 
-By default, Deis Workflow ships with the [database] component, which provides an in-cluster PostgreSQL database backed up to in-cluster or off-cluster [object storage]. Currently, for object storage, which is utilized by _several_ Workflow components, only off-cluster solutions such as S3 of GCS are recommended in production environments. Experience has shown that many operators already opting for off-cluster object storage similarly prefer to host Postgres off-cluster as well, using Amazon RDS or similar. When excercising both options, a Workflow installation becomes entirely stateless, and is thus restored or rebuilt with greater ease should the need ever arise.
+By default, Deis Workflow ships with the [database] component, which provides an in-cluster PostgreSQL database backed up to in-cluster or off-cluster [object storage]. Currently, for object storage, which is utilized by _several_ Workflow components, only off-cluster solutions such as S3 or GCS are recommended in production environments. Experience has shown that many operators already opting for off-cluster object storage similarly prefer to host Postgres off-cluster as well, using Amazon RDS or similar. When excercising both options, a Workflow installation becomes entirely stateless, and is thus restored or rebuilt with greater ease should the need ever arise.
 
 ## Provisioning off-cluster Postgres