Fix hostname issue.

[veritas9872]

cresset/docker-compose.yaml

Lines 48 to 50 in 0b547ed

	hostname: ${SERVICE} # Makes `pure` terminals easier to tell apart.
	extra_hosts: # Prevents "unknown host" issue when using `sudo`.
	- "${SERVICE}:127.0.0.1"

I found that adding a hostname manually caused issues when using multi-node communications.
Since these were only put in due to decorative reasons, removing them is probably a good idea.