Checkpoint peering identity and opt-in discovery

package.json

@@ -16,6 +16,7 @@
     "test:compose": "node tools/test-compose.js",
     "test:ui": "node tools/test-compose.js --settings-ui --queue-ui --collections-ui --reading-ui",
     "test:direction-ui": "node tools/test-compose.js --direction-ui",
+    "test:discovery-ui": "node tools/test-compose.js --discovery-ui",
     "demo": "node tools/make-dummy.js library",
     "scrape": "node scraper/cli.js",
     "test": "npm run test:reader && npm run test:scraper && npm run test:runtime && npm run test:peer",