#!/usr/bin/env sh
set -e

# Generate a unique token per container launch
TOKEN="$(cat /proc/sys/kernel/random/uuid)"  # or: TOKEN="$(date +%s%N)"

# Write it into a file NGINX will include
cat >/etc/nginx/conf.d/_release_token.conf <<EOF
# auto-generated at container start
set \$release_token "$TOKEN";
EOF

# Then exec nginx
exec nginx -g 'daemon off;'