Setup Firebase hosting for plural

.firebaserc

@@ -0,0 +1,5 @@
+{
+  "projects": {
+    "default": "pluralsh"
+  }
+}

.github/workflows/firebase-hosting-pull-request.yml

@@ -0,0 +1,17 @@
+# This file was auto-generated by the Firebase CLI
+# https://github.com/firebase/firebase-tools
+
+name: Deploy to Firebase Hosting on PR
+'on': pull_request
+jobs:
+  build_and_preview:
+    if: '${{ github.event.pull_request.head.repo.full_name == github.repository }}'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - run: cd www && yarn install --frozen-lockfile && npm run build
+      - uses: FirebaseExtended/action-hosting-deploy@v0
+        with:
+          repoToken: '${{ secrets.GITHUB_TOKEN }}'
+          firebaseServiceAccount: '${{ secrets.FIREBASE_SERVICE_ACCOUNT_PLURALSH }}'
+          projectId: pluralsh

firebase.json

@@ -0,0 +1,16 @@
+{
+  "hosting": {
+    "public": "www/build",
+    "ignore": [
+      "firebase.json",
+      "**/.*",
+      "**/node_modules/**"
+    ],
+    "rewrites": [
+      {
+        "source": "**",
+        "destination": "/index.html"
+      }
+    ]
+  }
+}

www/src/helpers/hostname.js

@@ -18,12 +18,12 @@ export function host() {
 }
 
 export function apiHost() {
-  switch (window.location.hostname) {
-    case 'localhost':
-      return 'app.plural.sh'
-    default:
-      return window.location.hostname
+  const { location: { hostname } } = window
+  if (hostname === 'localhost' || hostname.endsWith('web.app')) {
+    return 'app.plural.sh'
   }
+
+  return hostname
 }
 
 export function secure() {

www/src/serviceWorker.js

@@ -14,6 +14,8 @@ const isLocalhost = Boolean(
   window.location.hostname === 'localhost' ||
     // [::1] is the IPv6 localhost address.
     window.location.hostname === '[::1]' ||
+    // ignore on preview branches
+    window.location.hostname.endsWith('web.app') ||
     // 127.0.0.1/8 is considered localhost for IPv4.
     window.location.hostname.match(
       /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/