Error on caddy proxy for rabbitmq

[joequant]

I am getting errors

opencex-caddy-1 | {"level":"info","ts":1681687764.4009528,"logger":"docker-proxy","msg":"Process Caddyfile","logs":"[ERROR] Removing invalid block: Caddyfile:2: unrecognized global option: reverse_proxy\n{\n\treverse_proxy http://172.18.0.6:15672\n}\n\n"}

The result for this error is that RMQDOMAIN is not set in the config script causing the label block for rabbitmq to read....

labels:
caddy:
caddy.reverse_proxy: "{{upstreams http 15672}}"

Not sure what is the right item to put here.