#!/bin/sh
set -eu

: "${BACKEND_UPSTREAM:?BACKEND_UPSTREAM is required (example: http://analytical-panel-backend:8000)}"
: "${BACKEND_HOST_HEADER:?BACKEND_HOST_HEADER is required (example: analytical-panel-backend)}"

BACKEND_UPSTREAM="${BACKEND_UPSTREAM%/}"
export BACKEND_UPSTREAM
export BACKEND_HOST_HEADER

envsubst '${BACKEND_UPSTREAM} ${BACKEND_HOST_HEADER}' \
  < /etc/nginx/templates/default.conf.template \
  > /etc/nginx/conf.d/default.conf

exec "$@"