feat: The Other Dude v9.0.1 — full-featured email system

ci: add GitHub Pages deployment workflow for docs site

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

infrastructure/docker/Dockerfile.frontend

@@ -0,0 +1,39 @@
+# Multi-stage build for TOD Frontend
+# Stage 1: build — Node.js build environment
+FROM node:18-alpine AS builder
+
+# Cap Node.js heap to 512 MB so tsc + vite build don't OOM a low-RAM server.
+# Vite's bundler defaults to using all available heap; on a 2-4 GB machine that
+# competes directly with the Go and Python builds happening in parallel.
+ENV NODE_OPTIONS="--max-old-space-size=1024"
+
+WORKDIR /build
+
+# Copy package files first (layer cache optimization)
+COPY frontend/package.json frontend/package-lock.json* ./
+
+# Install dependencies
+RUN npm ci --ignore-scripts
+
+# Copy frontend source and build
+# Note: skip tsc type-check in Docker build (esbuild handles transpilation).
+# Run `npm run build` locally or in CI for full type-checking.
+COPY frontend/ .
+RUN npx vite build
+
+# Stage 2: runtime — nginx serving static SPA files
+FROM nginx:alpine AS runtime
+
+# Remove default nginx config
+RUN rm /etc/nginx/conf.d/default.conf
+
+# Custom nginx config for SPA routing (all routes -> index.html)
+COPY infrastructure/docker/nginx-spa.conf /etc/nginx/conf.d/default.conf
+
+# Copy built assets from builder stage
+COPY --from=builder /build/dist /usr/share/nginx/html
+
+# nginx runs as nginx user (non-root by convention)
+EXPOSE 80
+
+CMD ["nginx", "-g", "daemon off;"]