Experimental port to Firebase hosting

modules/functions/servePublicKey.js

@@ -0,0 +1,13 @@
+import express from 'express';
+import cors from 'cors';
+
+import showPublicKey from '../actions/showPublicKey';
+
+const app = express();
+
+app.disable('x-powered-by');
+
+app.use(cors());
+app.use(showPublicKey);
+
+export default app;