docs: Update docs for web

Author: PartMan7

src/web/README.md

@@ -1,6 +1,12 @@
 # Web
 
-PartBot's Web module handles networks and routing, including a CDN and a filehost.
+PartBot's Web module handles networks and routing and stuff.
 
-The production deployment uses the NGINX configs defined in `@/web/configs`, which are build through the `build-configs`
-script. This may be safely ignored if you do not plan on using an NGINX configuration.
+The setup isn't very pretty, but broadly:
+
+- `@/web/api` has all the API endpoints; endpoints export a `handler` function and an optional `verb`.
+- `@/web/ui` has all the frontend pages served under `SITE/`. Each file exports a `handler` that can either use `res.render` to render the given React code as static markup, or `res.getBundle` to load a bundle from `@/web/react/pages`.
+- `@/web/react/pages` is compiled to bundles that are injected into pages that use `getBundle`, while `@/web/react/compiled` has the Webpack-compiled files for the same. Abstracted code for React is in `@/web/react/components`.
+- `@/web/static` has static files served under `SITE/static`.
+
+The loaders for all of these are in `@/web/loaders`, and use the file structure for nesting.