todo/frontend/public/config.json

{
  "hosts": {
    "localhost:3000": "LOCAL",
    "dev.j4.pm": "test",
    "todo.j4.pm": "prod"
  },
  "defaultConfig": {},
  "configs": {
    "LOCAL": {},
    "test": {"apiUrl": "https://dev.j4.pm/api"},
    "prod": {"apiUrl": "https://todo.j4.pm/api"}
  }
}