chore: update content and add generated PDF

19_observability/19.3_performance_optimization.md

@@ -305,7 +305,7 @@ journalctl -u docker -n 100 | grep -i "oom"
 
 ```python
 # Dockerfile
-FROM python:3.11-slim
+FROM python:3.14-slim
 WORKDIR /app
 COPY requirements.txt .
 RUN pip install -r requirements.txt memory_profiler tracemalloc
@@ -424,7 +424,7 @@ chmod +x hadolint
 
 ```dockerfile
 # Stage 1: 构建阶段
-FROM golang:1.20-alpine AS builder
+FROM golang:1.26-alpine AS builder
 
 WORKDIR /build
 
@@ -453,13 +453,13 @@ COPY --from=builder /build/app /app
 EXPOSE 8080
 ENTRYPOINT ["/app"]
 
-# 最终镜像大小通常 < 15MB（相比 golang:1.20-alpine 的 ~1GB）
+# 最终镜像大小通常 < 15MB（相比 golang:1.26-alpine 的 ~1GB）
 ```
 **Node.js 应用的多阶段构建：**
 
 ```dockerfile
 # Stage 1: 依赖安装
-FROM node:18-alpine AS dependencies
+FROM node:24-alpine AS dependencies
 
 WORKDIR /app
 COPY package*.json ./
@@ -467,7 +467,7 @@ RUN npm ci --only=production && \
     npm cache clean --force
 
 # Stage 2: 构建阶段
-FROM node:18-alpine AS builder
+FROM node:24-alpine AS builder
 
 WORKDIR /app
 COPY package*.json ./
@@ -477,7 +477,7 @@ COPY . .
 RUN npm run build
 
 # Stage 3: 运行阶段
-FROM node:18-alpine
+FROM node:24-alpine
 
 WORKDIR /app
 
@@ -504,7 +504,7 @@ CMD ["node", "dist/index.js"]
 
 ```dockerfile
 # Stage 1: 构建阶段
-FROM python:3.11-slim AS builder
+FROM python:3.14-slim AS builder
 
 WORKDIR /build
 
@@ -516,7 +516,7 @@ COPY requirements.txt .
 RUN pip install --user --no-cache-dir -r requirements.txt
 
 # Stage 2: 运行阶段
-FROM python:3.11-slim
+FROM python:3.14-slim
 
 WORKDIR /app
 
@@ -550,7 +550,7 @@ CMD ["python", "app.py"]
 □ 使用 BuildKit 缓存优化加速构建
 
 # 优化示例：
-FROM ubuntu:22.04
+FROM ubuntu:24.04
 
 # ❌ 不推荐
 RUN apt-get update