feat: add premium Next.js scaffold to Domain_web

Bundle geoexport-premium (Docker, docs, Next.js) alongside the
working static site mirror; production VPS install still uses site/.

Co-authored-by: Cursor <cursoragent@cursor.com>

premium/Dockerfile

@@ -0,0 +1,26 @@
+# GeoExport — production image (Next.js)
+FROM node:22-alpine AS base
+RUN apk add --no-cache libc6-compat
+WORKDIR /app
+
+FROM base AS deps
+COPY package.json ./
+RUN npm install
+
+FROM base AS builder
+COPY --from=deps /app/node_modules ./node_modules
+COPY . .
+ENV NEXT_TELEMETRY_DISABLED=1
+RUN npm run build
+
+FROM base AS runner
+ENV NODE_ENV=production
+ENV NEXT_TELEMETRY_DISABLED=1
+COPY --from=builder /app/package.json ./
+COPY --from=builder /app/node_modules ./node_modules
+COPY --from=builder /app/.next ./.next
+COPY --from=builder /app/public ./public
+EXPOSE 3000
+ENV PORT=3000
+ENV HOSTNAME=0.0.0.0
+CMD ["npm", "run", "start"]