Ignore proxy TLS certfiicate

If you have an upstream server that is serving an invalid cert and you want to ignore the fact that it's invalid, throwing security to the wind, you can do the following for example

caddy: example.com
caddy.handle_path: /sub-path/*
caddy.handle_path.reverse_proxy: "{{upstreams https 443}}"
caddy.handle_path.reverse_proxy.transport: http
caddy.handle_path.reverse_proxy.transport.tls: ""
caddy.handle_path.reverse_proxy.transport.tls_insecure_skip_verify: ""