fix deno.js to deploy static site

js/deno.js

@@ -3,6 +3,8 @@ async function handler(req){
   let url = req.url;
   let iSlash = url.indexOf('/',11);
   let path = url.substring(iSlash+1);
+  if(path.endsWith('/'))
+    path = path + 'index.html';
   return await serveFile(req, `${Deno.cwd()}/`+path);
 };