Configure Vue to have a development and a production build - vue.js

Question

I inherited a Vue project that only builds production builds and uglifies everything. It doesn't have a webpack.config.js like I'm used to, it only has a vue.config.js file. When I do npm run build it builds a production. The build command is "build": "vue-cli-service build" and I don't see a way to do something like --mode=development.
I tried adding a webpack.config.js file which built, but at the same time broke the webpage, because it no longer built the same.
Here is my vue.config.js file:
const path = require('path');
const CopyWebpackPlugin = require('copy-webpack-plugin');
module.exports = {
lintOnSave: true,
baseUrl: 'http://localhost:8080',
configureWebpack: {
entry: './src/main.js',
module: {
rules: [
{
test: /libs\.js$/,
use: {
loader: 'script-loader'
}
},
{
test: /angLibs\.js$/,
use: {
loader: 'script-loader'
}
},
{
test: /welcome\.js$/,
use: {
loader: 'script-loader'
}
},
{
test: /app\.js$/,
use: {
loader: 'script-loader'
}
}
]
},
output: {
publicPath: process.env.VUE_APP_ROOT_API + '/',
chunkFilename: '[name].bundle.js'
},
plugins: [
new CopyWebpackPlugin([
{ from: path.resolve(__dirname, './static/App/i18n/*.*'), to: path.resolve(__dirname, './dist/'), force: true }
], { copyUnmodified: true, context: 'static/' }),
new CopyWebpackPlugin([
{ from: path.resolve(__dirname, './static/Content/*/*.*'), to: path.resolve(__dirname, './dist/'), force: true }
], { copyUnmodified: true, context: 'static/' }),
new CopyWebpackPlugin([
{ from: path.resolve(__dirname, './static/fonts/*.*'), to: path.resolve(__dirname, './dist/'), force: true }
], { copyUnmodified: true, context: 'static/' }),
new CopyWebpackPlugin([
{ from: path.resolve(__dirname, './static/react/*.*'), to: path.resolve(__dirname, './dist/'), force: true }
], { copyUnmodified: true, context: 'static/' })
]
}
};
I would like to have a development build that is quicker and is not uglified/minified (or retains the map files of files it includes in the webpack).

Answer 1

That's a Vue CLI v3 build. For a webpack dev-server with hot-reload, use npm run serve.
Otherwise, you can build in development mode via
npx vue-cli-service build --mode development
or, if you don't have npx
./node_modules/.bin/vue-cli-service build --mode development
See https://cli.vuejs.org/guide/mode-and-env.html
Another option is to add a new script to package.json, eg
"buildDev": "vue-cli-service build --mode development"
and run
npm run buildDev
For configuring Webpack, see https://cli.vuejs.org/guide/webpack.html.
For example
// vue.config.js
module.exports = {
configureWebpack: {
// config goes here
}
}