docker implementation

backend/Dockerfile

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+# Backend Dockerfile for Placebo.mk NestJS API
+
+# Build stage
+FROM node:20-alpine AS builder
+
+WORKDIR /app
+
+# Copy package files
+COPY package*.json ./
+COPY package-lock.json* ./
+
+# Install dependencies
+RUN npm ci --only=production
+
+# Copy source code
+COPY . .
+
+# Build TypeScript
+RUN npm run build
+
+# Production stage
+FROM node:20-alpine
+
+WORKDIR /app
+
+# Create non-root user
+RUN addgroup -g 1001 -S nodejs && \
+    adduser -S nodejs -u 1001
+
+# Copy built application from builder stage
+COPY --from=builder --chown=nodejs:nodejs /app/dist ./dist
+COPY --from=builder --chown=nodejs:nodejs /app/node_modules ./node_modules
+COPY --from=builder --chown=nodejs:nodejs /app/package*.json ./
+
+# Copy environment configuration
+COPY --chown=nodejs:nodejs .env.example .env
+
+# Switch to non-root user
+USER nodejs
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+  CMD node -e "require('http').get('http://localhost:3000/health', (r) => {if(r.statusCode !== 200) throw new Error()})"
+
+# Expose port
+EXPOSE 3000
+
+# Start application
+CMD ["node", "dist/main.js"]