My baseline of understanding of heredoc is that it is used for multiline strings.
But what is the significance of using a heredoc within another heredoc.
Why do we have a heredoc in block 102-108 of the following. How should I read/interpret it? https://github.com/terraform-google-modules/terraform-docs-samples/blob/145717145202025d4865ca9d6213cc5a19300f25/external_tcp_proxy_lb_mig_backend/main.tf#L102