Add dynamic links.

firebase.json

@@ -1,6 +1,14 @@
 {
   "hosting": {
     "public": ".",
-    "ignore": ["firebase.json", "**/.*", "**/node_modules/**"]
+    "ignore": ["firebase.json", "**/.*", "**/node_modules/**"],
+    "cleanUrls": true,
+    "appAssociation": "AUTO",
+    "rewrites": [
+      {
+        "source": "/**",
+        "dynamicLinks": true
+      }
+    ]
   }
 }