trails/infrastructure/caddy/Caddyfile

{
	# Admin API on loopback only. It can reconfigure the proxy, so it must
	# not be reachable by other containers on the Docker network (a journal
	# / planner RCE could otherwise rewrite routes). Reloads run in-container
	# (`docker compose exec caddy caddy reload`) over this loopback endpoint,
	# matching infrastructure/brouter-host/Caddyfile.
	admin localhost:2019
}

# Read-only Prometheus metrics on a dedicated network-reachable port,
# split off the admin endpoint above so scraping doesn't require exposing
# the admin API. Prometheus scrapes caddy:2020 (see prometheus.yml).
:2020 {
	metrics /metrics
}

(security_headers) {
	header {
		Strict-Transport-Security "max-age=31536000; includeSubDomains; preload"
		X-Content-Type-Options "nosniff"
		X-Frame-Options "DENY"
		Referrer-Policy "strict-origin-when-cross-origin"
		Permissions-Policy "camera=(), microphone=(), geolocation=()"
		Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline' blob:; worker-src 'self' blob:; style-src 'self' 'unsafe-inline'; img-src 'self' data: https://*.tile.openstreetmap.org; connect-src 'self' wss: https://*.sentry.io https://*.ingest.de.sentry.io; font-src 'self';"
	}
}

(block_scanners) {
	@scanners path /.env* /.git* /wp-* /wp-admin* /admin* /config.* /backup* /.aws* /.docker* /composer* /vendor* *.php *.asp
	respond @scanners 403
}

{$DOMAIN:trails.cool} {
	import security_headers
	import block_scanners
	log {
		output stdout
		format json
	}
	reverse_proxy journal:3000 {
		# During an `apps` deploy the journal container is briefly down
		# (~10–30s) while compose swaps containers. Without these,
		# Caddy returns 502 immediately and the `caddy-502-rate` alert
		# trips on every deploy. With them, Caddy holds and retries
		# against the upstream for up to 30s — restart becomes
		# invisible to clients. A real outage longer than 30s still
		# 502s and correctly trips the alert.
		lb_try_duration 30s
		lb_try_interval 250ms
	}
}

www.{$DOMAIN:trails.cool} {
	redir https://{$DOMAIN:trails.cool}{uri} permanent
}

grafana.internal.{$DOMAIN:trails.cool} {
	reverse_proxy grafana:3000
}

planner.{$DOMAIN:trails.cool} {
	header {
		Strict-Transport-Security "max-age=31536000; includeSubDomains; preload"
		X-Content-Type-Options "nosniff"
		X-Frame-Options "DENY"
		Referrer-Policy "strict-origin-when-cross-origin"
		Permissions-Policy "camera=(), microphone=(), geolocation=()"
		Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline' blob:; worker-src 'self' blob:; style-src 'self' 'unsafe-inline'; img-src 'self' data: https://*.tile.openstreetmap.org; connect-src 'self' wss: https://{$DOMAIN:trails.cool} https://*.sentry.io https://*.ingest.de.sentry.io; font-src 'self';"
	}
	import block_scanners
	log {
		output stdout
		format json
	}
	reverse_proxy planner:3001 {
		# Same rationale as the journal block — see the comment there.
		lb_try_duration 30s
		lb_try_interval 250ms
	}
}

# ── Staging ──────────────────────────────────────────────────────────────
# Persistent staging instance. CSP allow-lists hardcode `staging.trails.cool`
# rather than `{$DOMAIN}` because the Caddy container runs with the
# production DOMAIN env (`trails.cool`); staging blocks need their own domain
# baked in. Upstreams are reached via `host.docker.internal` because the
# staging compose project publishes its containers on the host's loopback
# (127.0.0.1:3100/3101) rather than joining the production Caddy network.

staging.{$DOMAIN:trails.cool} {
	import security_headers
	import block_scanners
	log {
		output stdout
		format json
	}
	reverse_proxy host.docker.internal:3110 {
		lb_try_duration 30s
		lb_try_interval 250ms
	}
}

planner.staging.{$DOMAIN:trails.cool} {
	header {
		Strict-Transport-Security "max-age=31536000; includeSubDomains; preload"
		X-Content-Type-Options "nosniff"
		X-Frame-Options "DENY"
		Referrer-Policy "strict-origin-when-cross-origin"
		Permissions-Policy "camera=(), microphone=(), geolocation=()"
		# connect-src includes wss + https://*.staging so PR-preview journals
		# (pr-N.staging.trails.cool) can use this shared planner. PR previews
		# are journal-only; this is the planner they all talk to.
		Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline' blob:; worker-src 'self' blob:; style-src 'self' 'unsafe-inline'; img-src 'self' data: https://*.tile.openstreetmap.org; connect-src 'self' wss://*.staging.{$DOMAIN:trails.cool} https://*.staging.{$DOMAIN:trails.cool} https://staging.{$DOMAIN:trails.cool} https://*.sentry.io https://*.ingest.de.sentry.io; font-src 'self';"
	}
	import block_scanners
	log {
		output stdout
		format json
	}
	reverse_proxy host.docker.internal:3111 {
		lb_try_duration 30s
		lb_try_interval 250ms
	}
}

# Per-PR preview snippets are written by cd-staging.yml into
# /etc/caddy/sites/pr-<N>.caddyfile and picked up here on Caddy reload. The
# glob is allowed to match nothing — Caddy treats an empty match as a no-op.
import /etc/caddy/sites/*.caddyfile