Dockerfile

# Stage 1: Dependencies and Build
FROM node:18-alpine AS builder

# Set working directory
WORKDIR /app

# Copy package files for dependency installation
COPY package.json package-lock.json* ./

# Install dependencies
RUN npm ci

# Copy all project files
COPY . .

# Build the application
RUN npm run build

# Stage 2: Production image
FROM node:18-alpine AS runner

WORKDIR /app

# Set environment to production
ENV NODE_ENV production

# Create a non-root user to run the app
RUN addgroup --system --gid 1001 nodejs \
    && adduser --system --uid 1001 nextjs

# Copy only necessary files from the builder stage
COPY --from=builder /app/public ./public
COPY --from=builder /app/.next/standalone ./
COPY --from=builder /app/.next/static ./.next/static

# Set the correct permissions
RUN chown -R nextjs:nodejs /app

# Switch to non-root user
USER nextjs

# Expose the port the app will run on
EXPOSE 3000

# Set the correct environment variables for Next.js
ENV PORT 3000
ENV HOSTNAME "0.0.0.0"

# Start the app
CMD ["node", "server.js"]