Dockerfile

# Multi-stage Docker build for StrellerMinds Backend
FROM node:18-alpine AS base

# Install system dependencies
RUN apk add --no-cache \
    dumb-init \
    curl \
    bash \
    && rm -rf /var/cache/apk/*

# Create app directory
WORKDIR /app

# Copy package files
COPY package*.json ./
COPY tsconfig*.json ./

# Development stage
FROM base AS development
ENV NODE_ENV=development
RUN npm ci --include=dev --legacy-peer-deps
COPY . .
EXPOSE 3000
CMD ["dumb-init", "npm", "run", "start:dev"]

# Build stage
FROM base AS build
ENV NODE_ENV=production

# Install all dependencies (including dev for build)
RUN npm ci --include=dev --legacy-peer-deps

# Copy source code
COPY . .

# Build the application
RUN npm run build

# Remove dev dependencies
RUN npm prune --production --legacy-peer-deps && npm cache clean --force

# Production stage
FROM node:18-alpine AS production

# Install dumb-init for proper signal handling
RUN apk add --no-cache dumb-init curl

# Create non-root user
RUN addgroup -g 1001 -S nodejs && \
    adduser -S nestjs -u 1001

# Set working directory
WORKDIR /app

# Copy built application and dependencies
COPY --from=build --chown=nestjs:nodejs /app/dist ./dist
COPY --from=build --chown=nestjs:nodejs /app/node_modules ./node_modules
COPY --from=build --chown=nestjs:nodejs /app/package*.json ./

# Create necessary directories
RUN mkdir -p /app/logs && chown nestjs:nodejs /app/logs

# Switch to non-root user
USER nestjs

# Expose port
EXPOSE 3000

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
    CMD curl -f http://localhost:3000/health || exit 1

# Set environment variables
ENV NODE_ENV=production
ENV PORT=3000

# Start the application
CMD ["dumb-init", "node", "dist/main.js"]