rewrite /path to root domain(/) for Single page application with any method

I am trying to map domain.com to domain.com/#/api. But it always routes back to home page. Anything I can do here to fix this ?

```{
"hosting": {
"public": "public",
"ignore": [
"firebase.json",
"**/.*",
"**/node_modules/**"
],
"rewrites": [
{
"source": "**",
"destination": "/#/api"
}
]
}
}
```