firebase.json

{
  "hosting": {
    "public": "public",
    "ignore": ["firebase.json", "**/.*", "**/node_modules/**"],
    "redirects": [
      {
        "source": "/coc",
        "destination": "https://developers.google.com/programs/community/gdg/resources/#code-of-conduct",
        "type": 302
      }
    ]
  },
  "emulators": {
    "hosting": {
      "port": 5000
    },
    "ui": {
      "enabled": true,
      "port": 4000
    }
  }
}