# Stage 1: Install production dependencies
FROM node:18-alpine AS deps
WORKDIR /usr/src/app
COPY package*.json ./
# Install only production dependencies
RUN npm install --omit=dev

# Stage 2: Final runtime image
FROM node:18-alpine AS runner
WORKDIR /usr/src/app

# Copy production dependencies from the 'deps' stage
COPY --from=deps /usr/src/app/node_modules ./node_modules
# Copy the application source code
COPY . .

# Set environment to production
ENV NODE_ENV=production

# Expose the application port
EXPOSE 3000

# Start the application
CMD ["node", "index.js"]