Clarify unattended setup instructions
Fixes
@@ -410,3 +410,10 @@ gopass --yes setup --remote github.com/example/pass.git --alias example --create
# For every other team member initialize a new store and clone the existing remote
gopass --yes setup --remote github.com/example/pass.git --alias example --name "Jane Doe" --email "jane.doe@example.com"
```
+
+The first command will create a new mount named `example` and push it to an empty (`--create`) remote.
+It will fail if the remote at `github.com/example/pass.git` is not empty.
+
+The second command will clone the existing (no `--create` flag) remote `github.com/example/pass.git`
+and mount it as the mount point `example`.
+
