fix: start nginx without resolving A-site at boot [deploy]

docker-entrypoint.d/40-a-upstream.sh

@@ -0,0 +1,18 @@
+#!/bin/sh
+set -eu
+
+CONF=/etc/nginx/conf.d/default.conf
+A_UPSTREAM="${A_UPSTREAM:-http://project57-deploy.ns-project57.svc.cluster.local:3000}"
+A_UPSTREAM="${A_UPSTREAM%/}"
+
+NS="$(awk '/^nameserver/{print $2; exit}' /etc/resolv.conf || true)"
+if [ -z "${NS}" ]; then
+  NS=kube-dns.kube-system.svc.cluster.local
+fi
+
+sed -i \
+  -e "s|__RESOLVER__|${NS}|g" \
+  -e "s|__A_UPSTREAM__|${A_UPSTREAM}|g" \
+  "${CONF}"
+
+nginx -t