fix(reward-service): 优化 Dockerfile 和添加 .dockerignore

问题：
1. Dockerfile 使用 COPY . . 会复制 node_modules 导致构建极慢
2. CMD 路径错误：dist/src/main.js 应该是 dist/main.js

修复：
- 添加 .dockerignore 排除 node_modules, dist 等
- 优化 Dockerfile 只复制必要文件 (COPY src ./src)
- 修正 CMD 路径为 dist/main.js
- 添加构建验证步骤 (test -f dist/main.js)
- 添加非 root 用户运行
- 添加健康检查

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

backend/services/reward-service/.dockerignore

@@ -0,0 +1,50 @@
+# Dependencies (will be installed fresh in container)
+node_modules/
+
+# Build output (will be built in container)
+dist/
+
+# Environment files (will be provided at runtime)
+.env
+.env.local
+.env.development
+.env.development.local
+.env.test
+.env.test.local
+.env.production
+.env.production.local
+
+# Git
+.git/
+.gitignore
+
+# IDE
+.idea/
+.vscode/
+*.swp
+*.swo
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Test
+coverage/
+.nyc_output
+
+# Logs
+logs/
+*.log
+
+# Docker
+Dockerfile
+docker-compose.yml
+.dockerignore
+
+# Documentation
+*.md
+*.png
+docs/
+
+# Claude
+.claude/

backend/services/reward-service/Dockerfile

@@ -1,3 +1,7 @@
+# =============================================================================
+# Reward Service Dockerfile
+# =============================================================================
+
 # Build stage
 FROM node:20-alpine AS builder
 
@@ -5,22 +9,27 @@ WORKDIR /app
 
 # Copy package files
 COPY package*.json ./
+COPY tsconfig*.json ./
+COPY nest-cli.json ./
 COPY prisma ./prisma/
 
 # Install dependencies
 RUN npm ci
 
-# Copy source code
-COPY . .
-
 # Generate Prisma client (dummy DATABASE_URL for build time only)
 RUN DATABASE_URL="postgresql://user:pass@localhost:5432/db" npx prisma generate
 
-# Build the application
+# Copy source code
+COPY src ./src
+
+# Build TypeScript
 RUN npm run build
 
+# Verify build output exists
+RUN ls -la dist/ && test -f dist/main.js
+
 # Production stage - use Debian slim for OpenSSL compatibility
-FROM node:20-slim AS production
+FROM node:20-slim
 
 WORKDIR /app
 
@@ -30,24 +39,32 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     wget \
     && rm -rf /var/lib/apt/lists/*
 
-# Copy package files and install production dependencies
+# Install production dependencies only
 COPY package*.json ./
 RUN npm ci --only=production
 
-# Copy Prisma files
+# Copy Prisma schema and generate client
 COPY prisma ./prisma/
-
-# Generate Prisma client for production (dummy DATABASE_URL for build time only)
 RUN DATABASE_URL="postgresql://user:pass@localhost:5432/db" npx prisma generate
 
-# Copy built application from builder stage
+# Copy built files
 COPY --from=builder /app/dist ./dist
 
-# Set environment
-ENV NODE_ENV=production
-ENV PORT=3005
+# Create non-root user
+RUN groupadd -g 1001 nodejs && \
+    useradd -u 1001 -g nodejs nestjs
 
+# Switch to non-root user
+USER nestjs
+
+ENV NODE_ENV=production
+
+# Expose port
 EXPOSE 3005
 
-# Run the application
-CMD ["node", "dist/src/main.js"]
+# Health check
+HEALTHCHECK --interval=30s --timeout=3s --start-period=40s --retries=3 \
+  CMD wget -q --spider http://localhost:3005/health || exit 1
+
+# Start service
+CMD ["node", "dist/main.js"]