How do I Deploy Astro SSR to Firebase Hosting

Question

What:
I am looking to build and deploy an Astro SSR project to Firebase hosting.

Problem / Issue:

1. Astro requires an adapter to be installed to build. I installed the node adapter; which is definitely not the right thing to do

2. Firebase hosting docs says it supports SSR (next JavaScript) - Docs

3. Have no idea how to deploy SSR. Already have a cloud function to retrieve data from firestore.

Answer 1

Adding on to gil.dev's correct answer, to use Astro with SSR, the @astrojs/node adapter is correct choice, but you must use it in middleware mode.

import { defineConfig } from 'astro/config';
import node from '@astrojs/node'

// https://astro.build/config
export default defineConfig({
  adapter: node({
    mode: "middleware"
  })
});