feat: docker buildx.

Dockerfile

@@ -1,12 +1,22 @@
-FROM node:25-alpine
-
+FROM node:25-alpine AS base
 WORKDIR /app
 
+# Dependencies stage
+FROM base AS deps
 COPY package*.json ./
 RUN npm install --production
 
+# Production stage
+FROM base AS production
+COPY --from=deps /app/node_modules ./node_modules
 COPY . .
 
 EXPOSE 3000
 
+# Create a non-root user
+RUN addgroup -g 1001 -S nodejs
+RUN adduser -S nextjs -u 1001
+
+USER nextjs
+
 CMD ["node", "server.js"]