add docker

Dockerfile

@@ -0,0 +1,41 @@
+# Multi-stage Dockerfile for Next.js (standalone output)
+
+# 1) Install dependencies
+FROM node:20-alpine AS deps
+WORKDIR /app
+# Install libc6-compat for some native deps if needed
+RUN apk add --no-cache libc6-compat
+COPY package*.json ./
+RUN npm ci
+
+# 2) Build
+FROM node:20-alpine AS builder
+WORKDIR /app
+COPY --from=deps /app/node_modules ./node_modules
+COPY . .
+ENV NEXT_TELEMETRY_DISABLED=1
+RUN npm run build
+
+# 3) Runtime (slim)
+FROM node:20-alpine AS runner
+WORKDIR /app
+ENV NODE_ENV=production
+ENV NEXT_TELEMETRY_DISABLED=1
+# Default internal port Next.js server listens to
+ENV PORT=3000
+
+# Copy standalone build output
+# This copies the compiled server and minimal node_modules
+COPY --from=builder /app/.next/standalone ./
+# Static assets
+COPY --from=builder /app/.next/static ./.next/static
+# Public assets
+COPY --from=builder /app/public ./public
+
+# Ensure data directory exists for caching JSON (mounted as a volume in compose)
+RUN mkdir -p /app/data
+
+EXPOSE 3000
+
+# Start the standalone server produced by Next.js
+CMD ["node", "server.js"]