message: Set default metrics url
diff: @@ -32,6 +32,12 @@ 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.
  + console.warn('process.env.SB_METRICS_URL not set, using default');
  + metricsUrl = 'https://metrics-prod.uproxy.org';
  + }
  if (!publicAddress) {
  console.error('Need to specify SB_PUBLIC_IP for invite links');
  