remove legacy root Tinode webapp

Dockerfile

@@ -1,9 +1,6 @@
 # ---- Stage 1: build static assets ----
-# The frontend was fully rewritten from scratch under web/ (Vite + React + TS) on branch
-# redesign/desktop-multicolumn, merged into dev 2026-09-09 -- this replaces the old webpack build
-# that used to live at the repo root (umd/, css/base.min.css, index.html, etc.). See web/README-
-# equivalent context in the redesign plan for why: this Dockerfile previously never touched web/ at
-# all, so every "deploy" kept shipping the old app regardless of what was on dev.
+# The active frontend lives under web/ (Vite + React + TypeScript). The legacy
+# root-level Webpack application has been removed; production must only build web/.
 FROM node:22-alpine AS build
 
 WORKDIR /app/web
@@ -26,10 +23,8 @@ COPY docker/nginx.conf /etc/nginx/conf.d/default.conf
 
 WORKDIR /usr/share/nginx/html
 
-# Vite's build output is fully self-contained: index.html + favicon.svg/icons.svg (from web/public/,
-# copied verbatim) + assets/ (content-hashed JS/CSS chunks) -- no separate umd/css/img/audio/
-# manifest/service-worker/firebase files the way the old build had, none of that machinery exists
-# in the new app.
+# Vite's build output is fully self-contained: index.html, public assets and
+# content-hashed JS/CSS chunks.
 COPY --from=build /app/web/dist/. ./
 
 HEALTHCHECK --interval=1m --timeout=3s --start-period=10s \