message: Fix const issue
diff: @@ -31,12 +31,11 @@ const DEFAULT_STATE_DIR = '/root/shadowbox/persisted-state';
  function main() {
  const verbose = process.env.LOG_LEVEL === 'debug';
  const publicAddress = process.env.SB_PUBLIC_IP;
  - const metricsUrl = process.env.SB_METRICS_URL;
  - if (!metricsUrl) {
  // Default to production metrics, as some old Docker images may not have
  // SB_METRICS_URL properly set.
  + const metricsUrl = process.env.SB_METRICS_URL || 'https://metrics-prod.uproxy.org';
  + if (!process.env.SB_METRICS_URL) {
  console.warn('process.env.SB_METRICS_URL not set, using default');
  - metricsUrl = 'https://metrics-prod.uproxy.org';
  }
  if (!publicAddress) {
  