[Vuejs]-How to route Vue Server to Node.js Backend

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OK, so I have installed webpack over npm. Additional I need some additional code in the vue.config.js, correct? Now my vue.config.js is:

const { defineConfig } = require('@vue/cli-service')
module.exports = defineConfig({
  transpileDependencies: true,
  configureWebpack: {
    devServer: {
      proxy: {
        '/api': {
          target: 'http://localhost:3080',
},},},},})

And edit the Endpoint to ...app.post("/api/signup",async (req,res)=>{... but its not work.

I get this error: Proxy error: Could not proxy request /api/signup from localhost:8080 to http://localhost:3080 (ECONNREFUSED).

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