Initial commit: WebGPU portfolio — generative-art site with DOM overlay

Dockerfile

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+# ---- stage 1: build ----
+FROM node:22-alpine AS build
+WORKDIR /app
+
+# Install deps (cache layer)
+COPY package.json package-lock.json* ./
+RUN npm ci
+
+# Copy source and build
+COPY tsconfig.json vite.config.ts index.html ./
+COPY src/ src/
+RUN npm run build
+
+# ---- stage 2: serve ----
+FROM nginx:alpine-slim AS serve
+COPY --from=build /app/dist /usr/share/nginx/html
+
+# Optional: custom nginx config for caching / security
+COPY nginx.default.conf /etc/nginx/conf.d/default.conf
+
+EXPOSE 80
+CMD ["nginx", "-g", "daemon off;"]