docker added

Dockerfile

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+# deps
+FROM node:20-alpine AS deps
+WORKDIR /app
+COPY package*.json ./
+RUN npm ci
+
+# build
+FROM node:20-alpine AS builder
+WORKDIR /app
+COPY --from=deps /app/node_modules ./node_modules
+COPY . .
+RUN npm run build
+
+# run
+FROM node:20-alpine AS runner
+WORKDIR /app
+ENV NODE_ENV=production
+
+# اگر از next start استفاده می‌کنی:
+COPY --from=builder /app/package.json ./package.json
+COPY --from=builder /app/next.config.* ./ 2>/dev/null || true
+COPY --from=builder /app/public ./public
+COPY --from=builder /app/.next ./.next
+COPY --from=builder /app/node_modules ./node_modules
+
+EXPOSE 3000
+CMD ["npm","start"]