Add missing docs for TLS config (#1565)

## Description

This should be highlighted given the use in testing

## Type of change

<!--- Please check the type of change your PR introduces: --->
- [x] 🗺️ Documentation

docs/docs/setup/repos.md

@@ -144,3 +144,9 @@ need to use the following flag with the initial Corso `repo init` command:
 ```bash
   --endpoint <domain.example.com>
 ```
+
+### Testing with insecure TLS configurations
+
+Corso also supports the use of object storage systems with no TLS certificate or with self-signed
+TLS certificates with the `--disable-tls` or `--disable-tls-verification` flags.
+[These flags](../cli/corso_repo_init_s3) should only be used for testing.