multistage docker

Dockerfile

@@ -1,23 +1,21 @@
-# Use an official Node.js runtime as the base image
-FROM node:18-alpine
-
-# Set the working directory in the container
+# Stage 1: Build
+FROM node:latest AS builder
 WORKDIR /app
-
-# Copy package.json and package-lock.json to the working directory
 COPY package*.json ./
-
-# Install project dependencies
 RUN npm install
-
-# Copy all source files to the working directory
 COPY . .
-
-# Build the Next.js application
 RUN npm run build
 
 # Expose the port your app runs on
 EXPOSE 7860
 
-# Define the command to run your app
-CMD [ "npm", "start" ]
+# Stage 2: Serve
+FROM node:alpine
+WORKDIR /app
+COPY --from=builder /app/.next ./.next
+COPY --from=builder /app/public ./public
+COPY --from=builder /app/package.json ./package.json
+
+RUN npm install next
+
+CMD ["npm", "start"]