jekyll: move jekyll back to root, but simpler setup, exclude via _config.yml

app: bundle jekyll docs into app, add 'yarn run docs' to build
ui: add back/forward arrows for app only, adjust responsiveness for app, add IS_APP flag injected via preload
ui: add animated logo, friendly message on empty replay frame
app: improve serve logic:
- serve static files from static root
- serve replay from http localhost instead to avoid proxying https for remote requests
- serve local lookup from http prefix also
- catch any fallthrough from replay as 404
- add timestamp to response channels to ensure uniqness

src/electron-preload.js

@@ -2,7 +2,9 @@
 
 import { CollectionLoader } from 'wabac/src/loaders';
 
-const { ipcRenderer } = require('electron');
+const { ipcRenderer, contextBridge } = require('electron');
+
+contextBridge.exposeInMainWorld('electron', {'IS_APP': true});
 
 const dbs = {};
 
@@ -17,7 +19,7 @@ async function getDB(name) {
   return dbs[name].store;
 }
 
-async function getResponse(event, request, coll, ts) {
+async function getResponse(event, request, coll, ts, channel) {
   const db = await getDB(coll);
   await db.initing;
 
@@ -25,8 +27,6 @@ async function getResponse(event, request, coll, ts) {
 
   const result = await db.getResource(req, "", {request});
 
-  const channel = "req:" + request.url;
-
   if (!result) {
     ipcRenderer.send(channel, 404);
     return;