build: updating with https://github.com/ecomplus/storefront-starter […

…skip ci]

.functions/README.md

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+## Deploy Storefront to Firebase
+
+Pre-rendered views and assets to [Firebase Hosting](https://firebase.google.com/docs/hosting?hl=pt-br), non-pre-rendered views SSRed with [Cloud Functions](https://firebase.google.com/docs/functions) and cached (acting like ISG).
+
+### Getting started
+
+1. [Create a service account](https://console.cloud.google.com/iam-admin/serviceaccounts) for your Firebase project directly on Google Cloud Platform;
+2. Generate and download a JSON key for the created account;
+3. Add a _secret_ to your GitHub repository with name `GCP_ACCOUNT_KEY` and paste the key JSON;
+
+#### Prepare CI files
+
+4. Copy new build and deploy GitHub Actions workflow from `.github/workflows/.firebase/build-and-deploy.yml` to `.github/workflows/build-and-deploy.yml`;
+
+```bash
+mv ./.github/workflows/.firebase/build-and-deploy.yml ./.github/workflows/build-and-deploy.yml
+```

.functions/index.js

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+const functions = require('firebase-functions')
+
+const { ssr } = require('@ecomplus/storefront-renderer/functions/')
+
+process.env.STOREFRONT_LONG_CACHE = 'true'
+
+exports.ssr = functions.https.onRequest((req, res) => ssr(req, res))