Create Dockerfile

Dockerfile

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+# syntax=docker/dockerfile:1.4
+
+# Use an official Node runtime as the base image
+FROM node:18 AS base
+
+# Create a deps stage for efficient caching
+FROM base AS deps
+WORKDIR /app
+
+# Copy package.json and package-lock.json
+COPY package*.json ./
+
+# Install dependencies
+RUN npm ci
+
+# Build stage
+FROM base AS builder
+WORKDIR /app
+COPY --from=deps /app/node_modules ./node_modules
+COPY . .
+
+# Production stage
+FROM base AS runner
+WORKDIR /app
+
+ENV NODE_ENV production
+
+# Create a non-root user
+RUN addgroup --system --gid 1001 nodejs
+RUN adduser --system --uid 1001 marpituser
+
+# Copy necessary files
+COPY --from=builder --chown=marpituser:nodejs /app/package*.json ./
+COPY --from=builder --chown=marpituser:nodejs /app/node_modules ./node_modules
+COPY --from=builder --chown=marpituser:nodejs /app/server.js ./
+
+# Switch to non-root user
+USER marpituser
+
+EXPOSE 3000
+ENV PORT 3000
+ENV HOSTNAME 0.0.0.0
+
+CMD ["node", "server.js"]