如何在Go Web服务器和Vue.js前台之间交换数据？http-post : 404

package main

import (
    "encoding/json"
    "fmt"
    "log"
    "net/http"
)

type RequestData struct {
    Message string `json:"message"`
}

type ResponseData struct {
    Result string `json:"result"`
}

func handlePostRequest(w http.ResponseWriter, r *http.Request) {
    // 解析请求的数据
    var requestData RequestData
    err := json.NewDecoder(r.Body).Decode(&requestData)
    if err != nil {
        http.Error(w, err.Error(), http.StatusBadRequest)
        return
    }

    // 处理数据并生成响应
    responseData := ResponseData{
        Result: "Hello " + requestData.Message,
    }

    // 将响应数据转换为JSON格式
    responseJSON, err := json.Marshal(responseData)
    if err != nil {
        http.Error(w, err.Error(), http.StatusInternalServerError)
        return
    }

    // 设置响应头并返回响应数据
    w.Header().Set("Content-Type", "application/json")
    w.Write(responseJSON)
}

func main() {
    http.HandleFunc("/api", handlePostRequest)
    log.Fatal(http.ListenAndServe(":8080", nil))
}

// 使用axios发送POST请求
axios.post('/api', {
  message: 'World'
})
  .then(function (response) {
    console.log(response.data.result);
  })
  .catch(function (error) {
    console.log(error);
  });