firebase.json

{
    "firestore": {
        "rules": "firestore.rules",
        "indexes": "firestore.indexes.json"
    },
    "functions": {
        "predeploy": ["npm --prefix \"$RESOURCE_DIR\" run lint"],
        "source": ".",
        "runtime": "nodejs12"
    },
    "hosting": {
        "public": "dist",
        "ignore": ["firebase.json", "**/.*", "**/node_modules/**"]
    },
    "emulators": {
        "auth": {
            "port": 9099
        },
        "functions": {
            "port": 5001
        },
        "firestore": {
            "port": 8080
        },
        "database": {
            "port": 9000
        },
        "hosting": {
            "port": 5000
        },
        "pubsub": {
            "port": 8085
        },
        "ui": {
            "enabled": true
        }
    },
    "remoteconfig": {
        "template": "remoteconfig.template.json"
    }
}