reorg dir structure:

- keep shared and electron build at root
- move static files for replayweb.page and Jekyll config to docs/
- move Jekyll markdown to docs/docs/

index.html

@@ -1,10 +0,0 @@
-<!doctype html>
-<html class="no-overflow">
-<head>
-<script src="./dist/frontend.js"></script>
-<!--<link href="./dist/frontend.css" rel="stylesheet"/>-->
-</head>
-<body>
-<app-main></app-main>
-</body>
-</html>