Enable Network Error Logging (#9151)

* enable Network Error Logging

* consolidate NEL and CSP reporting in a single `docs` project

vercel.json

@@ -17,7 +17,15 @@
         },
         {
           "key": "Content-Security-Policy",
-          "value": "upgrade-insecure-requests; default-src 'none'; script-src 'self' 'unsafe-inline' 'unsafe-eval' *.sentry-cdn.com www.googletagmanager.com plausible.io; connect-src 'self' *.sentry.io sentry.io *.algolia.net *.algolianet.com *.algolia.io plausible.io reload.getsentry.net storage.googleapis.com; img-src * 'self' data: www.google.com www.googletagmanager.com; style-src 'self' 'unsafe-inline'; font-src 'self' fonts.gstatic.com; frame-src demo.arcade.software player.vimeo.com; worker-src blob:; report-uri https://o1.ingest.sentry.io/api/1297620/security/?sentry_key=b3cfba5788cb4c138f855c8120f70eab"
+          "value": "upgrade-insecure-requests; default-src 'none'; script-src 'self' 'unsafe-inline' 'unsafe-eval' *.sentry-cdn.com www.googletagmanager.com plausible.io; connect-src 'self' *.sentry.io sentry.io *.algolia.net *.algolianet.com *.algolia.io plausible.io reload.getsentry.net storage.googleapis.com; img-src * 'self' data: www.google.com www.googletagmanager.com; style-src 'self' 'unsafe-inline'; font-src 'self' fonts.gstatic.com; frame-src demo.arcade.software player.vimeo.com; worker-src blob:; report-uri https://o1.ingest.sentry.io/api/1267915/security/?sentry_key=ad63ba38287245f2803dc220be959636"
+        },
+        {
+          "key": "NEL",
+          "value": "{\"report_to\":\"nel\",\"max_age\":3600,\"success_fraction\":0.0,\"failure_fraction\":0.05}"
+        },
+        {
+          "key": "Report-To",
+          "value": "{\"group\":\"nel\",\"max_age\":3600,\"endpoints\":[{\"url\":\"https://o1.ingest.sentry.io/api/1267915/nel/?sentry_key=ad63ba38287245f2803dc220be959636\"}]}"
         }
       ]
     }