• 更新包索引：sudo apt update
• 安装依赖：sudo apt install apt-transport-https ca-certificates curl gnupg lsb-release
• 添加Docker官方GPG密钥：curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
• 添加仓库源：echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
• 安装Docker：sudo apt update && sudo apt install docker-ce docker-ce-cli containerd.io
• 安装Docker Compose：sudo curl -L "https://github.com/docker/compose/releases/latest/download/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose && sudo chmod +x /usr/local/bin/docker-compose
• 将当前用户加入docker组避免使用sudo：sudo usermod -aG docker $USER（需重新登录）

• 下载并安装 Docker Desktop：访问 https://www.php.cn/link/2997607ae9ee935528ee27423a5b6e30
• Docker Desktop 已包含 Docker Engine、CLI 和 Compose，安装后即可使用

<span style="color: #006699"># 使用官方Golang镜像作为基础镜像</span>
FROM golang:1.21-alpine AS builder
<p><span style="color: #006699"># 设置工作目录</span>
WORKDIR /app</p><p><span style="color: #006699"># 拷贝go.mod和go.sum（如果存在）以利用缓存</span>
COPY go.mod ./
COPY go.sum ./<br />
RUN go mod download</p><p><span style="color: #006699"># 拷贝源代码</span>
COPY . .</p><p><span style="color: #006699"># 构建二进制文件</span>
RUN CGO_ENABLED=0 GOOS=linux go build -o main .</p><p><span style="color: #006699"># 最终阶段：使用轻量级镜像运行</span>
FROM alpine:latest
RUN apk --no-cache add ca-certificates
WORKDIR /root/</p><p><span style="color: #006699"># 从构建阶段拷贝二进制文件</span>
COPY --from=builder /app/main .</p><p><span style="color: #006699"># 暴露端口（根据实际服务调整）</span>
EXPOSE 8080</p><p><span style="color: #006699"># 启动命令</span>
CMD ["./main"]</p>

version: '3.8'
services:
  app:
    build: .
    ports:
      - "8080:8080"
    environment:
      - DB_HOST=db
      - DB_PORT=5432
    depends_on:
      - db
<;p>db:
image: postgres:15
environment:
POSTGRES_DB: myapp
POSTGRES_USER: user
POSTGRES_PASSWORD: password
ports:</p><ul><li>"5432:5432"
volumes:</li><li>postgres_data:/var/lib/postgresql/data</li></ul><p>volumes:
postgres_data:</p>

• 在Dockerfile中添加air用于热重载（仅开发环境）：

RUN go install github.com/cosmtrek/air@latest

• 修改compose文件中app服务的command：

command: air -c .air.toml

• 将本地代码挂载到容器中，实现修改即时生效：

volumes:
  - .:/app
  - /app/bin
  - /app/vendor

• 注意：生产环境不要启用热重载或代码挂载