Golang如何使用Docker构建容器化应用

package main
<p>import (
"fmt"
"net/http"
)</p><p>func handler(w http.ResponseWriter, r *http.Request) {
fmt.Fprintf(w, "Hello from Golang in Docker!")
}</p><p>func main() {
http.HandleFunc("/", handler)
fmt.Println("Server starting on :8080")
http.ListenAndServe(":8080", nil)
}</p>

# 使用官方Golang镜像作为构建基础
FROM golang:1.21-alpine AS builder
<h1>设置工作目录</h1><p>WORKDIR /app</p><h1>复制go mod相关文件</h1><p>COPY go.mod go.sum ./
RUN go mod download</p><h1>复制源码</h1><p>COPY . .</p><h1>构建静态二进制文件</h1><p>RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o main .</p><h1>第二阶段：使用轻量基础镜像运行</h1><p>FROM alpine:latest
RUN apk --no-cache add ca-certificates</p><p>WORKDIR /root/</p><h1>从上一阶段复制可执行文件</h1><p>COPY --from=builder /app/main .</p>
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                <h1>暴露端口</h1><p>EXPOSE 8080</p><h1>启动命令</h1><p>CMD ["./main"]</p>

docker build -t golang-app .

docker run -d -p 8080:8080 --name my-go-app golang-app