firebase.json

{
  "hosting": [
    {
      "target": "dashboard",
      "public": "dashboard/dist",
      "ignore": ["firebase.json", "**/.*", "**/node_modules/**"],
      "rewrites": [
        { "source": "**", "destination": "/index.html" }
      ]
    },
    {
      "target": "mainProject",
      "public": "main-project/dist",
      "ignore": ["firebase.json", "**/.*", "**/node_modules/**"],
      "rewrites": [
        {
          "source": "**",
          "destination": "/index.html"
        }
      ]
    },
    {
      "target": "secondProject",
      "public": "second-project/dist",
      "ignore": ["firebase.json", "**/.*", "**/node_modules/**"],
      "rewrites": [
        {
          "source": "**",
          "destination": "/index.html"
        }
      ]
    },
    {
      "target": "thirdProject",
      "public": "third-project/dist",
      "ignore": ["firebase.json", "**/.*", "**/node_modules/**"],
      "rewrites": [
        {
          "source": "**",
          "destination": "/index.html"
        }
      ]
    }
  ]
}