rojo/test-project/rojo.json

{
  "name": "test-project",
  "servePort": 8001,
  "partitions": {
    "src": {
      "path": "src",
      "target": "ReplicatedFirst"
    },
    "extra": {
      "path": "extra-script.lua",
      "target": "ReplicatedStorage.ExtraScript"
    }
  }
}