halkyon/deploy/sidecars/train.caddy

# Halkyon Train's site (compose.train.yaml, ADR 0030, D46): its API server, and its own
# map where compose.maps.yaml switches it on (D50). Its web server (8082) takes the
# register's calls between the instance's services (`/halkyon-base/…`, ADR 0016) on the
# instance's own network, never through here; through here only the map's style and
# the tiles' check (train-maps.caddy).
{$TRAIN_DOMAIN} {
	encode zstd gzip

	# Train's own map where compose.maps.yaml mounts it (train-maps.caddy); none
	# without.
	import /etc/caddy/train/*.caddy

	# Serverpod's streaming methods use WebSockets; reverse_proxy upgrades them as-is.
	# The visitor's address comes last in X-Forwarded-For, as for Learn's server.
	handle {
		reverse_proxy train-server:8080
	}
}