diff --git a/.env b/.env
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+++ b/.env
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+COMPOSE_PROJECT_NAME=coredns
+
+# CoreDNS image pin — use a digest in real deploys
+COREDNS_IMAGE=coredns/coredns:1.11.3
+
+# Host ports. systemd-resolved usually binds 53, so default to 5353.
+# Override to 53 if you actually want this to be the host's resolver.
+DNS_PORT=1053
+METRICS_PORT=9153
+HEALTH_PORT=8080