Merge pull request ManageIQ#385 from nenioscio/patch-1

Fix small typo in export DATABASE_URL

developer_setup.md

@@ -163,7 +163,7 @@ CentOS 7 requires the `rh-postgresql10` SCL environment in order to compile the
 If you've run PostgreSQL in a container, be sure to export the `DATABASE_URL` variable to connect to the container over TCP instead of a UNIX file socket.
 
 ```bash
-export DATABASE_URL='posgresql://localhost:5432' # optional, only necessary if PostgreSQL is running in a container
+export DATABASE_URL='postgresql://localhost:5432' # optional, only necessary if PostgreSQL is running in a container
 ```
 
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