firebase.json

{
  "firestore": {
    "rules": "firestore.rules",
    "indexes": "firestore.indexes.json"
  },
  "hosting": {
    "public": "build",
    "ignore": [
      "firebase.json",
      "**/.*",
      "**/node_modules/**"
    ],
    "headers": [{
      "source": "**",
      "headers": [{
        "key": "Content-Security-Policy",
        "value": "default-src 'none'; font-src 'self' https://fonts.gstatic.com; script-src 'self' 'unsafe-inline' https://ajax.cloudflare.com https://static.cloudflareinsights.com https://www.youtube.com; connect-src 'self'; img-src 'self'; frame-src 'self' https://www.youtube.com; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com https://www.youtube.com;base-uri 'self';form-action 'self'; manifest-src 'self'"
      },{
        "key": "X-Frame-Options",
        "value": "deny"
      },{
        "key" : "X-Content-Type-Options",
        "value" : "nosniff"
      }, {
        "key" : "X-XSS-Protection",
        "value" : "1; mode=block"
      }, {
        "key" : "Referrer-Policy",
        "value" : "no-referrer-when-downgrade"
      }, { 
        "key": "Permissions-Policy",
        "value": "microphone=(), camera=(), accelerometer=(), gyroscope=(), magnetometer=(), payment=()"
      }]
    },{
      "source": "**/*.@(eot|otf|ttf|ttc|woff|font.css)",
      "headers": [{
        "key": "Access-Control-Allow-Origin",
        "value": "*"
      }]
    }, {
      "source": "**/*.@(eot|otf|ttf|ttc|woff|font.css)",
      "headers": [{
        "key": "Cache-Control",
        "value": "max-age=31536000"
      }]
    }, {
      "source": "**/*.@(jpg|jpeg|gif|png|webp|avif|svg|ico)",
      "headers": [{
        "key": "Cache-Control",
        "value": "max-age=31536000"
      }]
    }, {
      "source": "**/*.@(js|css)",
      "headers": [{
        "key": "Cache-Control",
        "value": "max-age=31536000"
      }]
    }, {
      "source": "**/*.@(html)",
      "headers": [{
        "key": "Cache-Control",
        "value": "max-age=3600"
      }]
    }, {
      "source": "404.html",
      "headers": [{
        "key": "Cache-Control",
        "value": "max-age=3600"
      }]
    }]
  },
  "storage": {
    "rules": "storage.rules"
  },
  "emulators": {
    "firestore": {
      "port": 8080
    },
    "database": {
      "port": 9000
    },
    "hosting": {
      "port": 5000
    },
    "cleanUrls": true,
    "trailingSlash": true,
    "appAssociation": "AUTO"
  }
}