firebase.json

{
  "firestore": {
    "rules": "firestore.rules",
    "indexes": "firestore.indexes.json"
  },
  "functions": [
    {
      "source": "functions",
      "codebase": "default",
      "runtime": "nodejs20",
      "ignore": [
        "node_modules",
        ".git",
        "firebase-debug.log",
        "firebase-debug.*.log",
        "*.local"
      ],
      "predeploy": [
        "npm --prefix \"$RESOURCE_DIR\" run lint"
      ]
    }
  ],
  "hosting": {
    "public": "build",
    "rewrites": [
      {
        "source": "/api/**",
        "function": "api"
      }
    ],
    "headers": [
      {
        "source": "/api/**",
        "headers": [
          {
            "key": "Cache-Control",
            "value": "public, max-age=300, s-maxage=600"
          }
        ]
      },
      {
        "source": "**/*.@(jpg|jpeg|gif|png|css|js|svg|ico|woff|woff2)",
        "headers": [
          {
            "key": "Cache-Control",
            "value": "public, max-age=31536000, immutable"
          }
        ]
      }
    ]
  }
}