feature: rewrite rule

Author: teramotodaiki

firebase.json

@@ -6,6 +6,10 @@
 			"**/.*",
 			"**/node_modules/**"
 		],
+		"rewrites": [{
+			"source": "**",
+			"destination": "/index.html"
+		}],
 		"headers": [{
 			"source": "**/*.json",
 			"headers": [{