Add postgres/ to .gitignore

`docker-compose.yml` contains a volume mapping from `./postgres` to `/var/lib/postgresql/data`, which creates a "postgres" directory that needs to be ignored by version control.

Add postgres/ to .gitignore
`docker-compose.yml` contains a volume mapping from `./postgres` to `/var/lib/postgresql/data`, which creates a "postgres" directory that needs to be ignored by version control.
8f33f1dd · Alf Eaton · 499f14a3 · 8f33f1dd
Commit 8f33f1dd authored Dec 21, 2017 by Alf Eaton
--- a/.gitignore
+++ b/.gitignore
@@ -13,7 +13,6 @@
 /tmp

 .idea/
-.env
 public/uploads/*
 public/test/*

@@ -21,4 +20,6 @@ public/test/*
 .env.test
 .env.development

-StepGemfile
\ No newline at end of file
+StepGemfile
+
+postgres/