Merge branch 'add-to-git-ignore' into 'master'

Add to git ignore

**What does this MR do?**

It adds the `.bundle` directory to the gitignore

**Why is this MR needed?**

Otherwise after you run `make` it will say that your git repo has changes. But it does not really, since that directory should not be commited.

See merge request !10

.gitignore

@@ -7,3 +7,4 @@ Procfile
 postgresql/data
 postgresql/.s.*
 redis/*.conf
+.bundle/