Add demo firebase config files.

example/firebase.json

@@ -4,11 +4,23 @@
   },
   "hosting": {
     "public": "dist",
+    "ignore": [
+      "firebase.json",
+      "**/.*",
+      "**/node_modules/**"
+    ],
     "rewrites": [
       {
         "source": "**",
         "destination": "/index.html"
       }
     ]
+  },
+  "firestore": {
+    "rules": "firestore.rules",
+    "indexes": "firestore.indexes.json"
+  },
+  "storage": {
+    "rules": "storage.rules"
   }
 }

example/firestore.indexes.json

@@ -0,0 +1,14 @@
+{
+  // Example:
+  //
+  // "indexes": [
+  //   {
+  //     "collectionId": "widgets",
+  //     "fields": [
+  //       { "fieldPath": "foo", "mode": "ASCENDING" },
+  //       { "fieldPath": "bar", "mode": "DESCENDING" }
+  //     ]
+  //   }
+  // ]
+  "indexes": []
+}

example/firestore.rules

@@ -0,0 +1,7 @@
+service cloud.firestore {
+  match /databases/{database}/documents {
+    match /todos/{id} {
+      allow read, write;
+    }
+  }
+}

example/storage.rules

@@ -0,0 +1,7 @@
+service firebase.storage {
+  match /b/{bucket}/o {
+    match /test.png {
+      allow read, write;
+    }
+  }
+}