Add Dockerfile

Dockerfile

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+FROM node:20-alpine3.18 AS deps
+RUN apk add --no-cache libc6-compat
+RUN npm install -g pnpm
+WORKDIR /app
+COPY package.json ./
+RUN npm install --force --production
+
+
+FROM node:20-alpine3.18 AS builder
+WORKDIR /app
+ARG NODE_ENV=production
+COPY . .
+COPY --from=deps /app/node_modules ./node_modules
+RUN npm run build
+
+
+FROM node:20-alpine3.18 AS runner
+WORKDIR /app
+ARG NODE_ENV=production
+COPY --from=builder /app/public ./public
+COPY --from=builder /app/.next ./.next
+COPY --from=builder /app/node_modules ./node_modules
+COPY --from=builder /app/package.json ./package.json
+COPY --from=builder /app/.env.production ./.env.production
+COPY --from=builder /app/next.config.js ./next.config.js
+
+EXPOSE 3000
+ENV PORT 3000
+CMD ["node_modules/.bin/next", "start"]