message: fix(aio): do not route `eplnkr` URLs to / from ServiceWorker
diff: "routing": {
  "index": "/index.html",
  "routes": {
  - "/": {
  - "prefix": true,
  - "onlyWithoutExtension": true
  + "/(?!e?plnkr)[^/.]*$": {
  + "match": "regex"
  }
  }
  }
  