npm run build generates more files than just bundle.js bundle.css - npm

Question

I'm working on a SPA with Vue.js and Django.
I run npm run build to generate the bundle files that will be used in production. I was expecting to only generate two files: dist/bundle.js and dist/bundle.css. However, besides the aforemetnioned files, a third js file is also being generated: dist/js/about.add8abe8.js.
Why is this?
In my Django project, inside the frontend/src/views/ directory I have 3 Vue components: Home.vue, List.vue and About.vue.
EDIT:
I don't have a webpack.config file. But these are some other files that may be relevant:
package.json:
{
"name": "frontend",
"version": "0.1.0",
"private": true,
"scripts": {
"serve": "vue-cli-service serve",
"build": "vue-cli-service build",
"lint": "vue-cli-service lint"
},
"dependencies": {
"bootstrap": "^4.3.1",
"bootstrap-vue": "^2.0.0-rc.19",
"core-js": "^2.6.5",
"vue": "^2.6.10",
"vue-router": "^3.0.3"
},
"devDependencies": {
"#vue/cli-plugin-babel": "^3.7.0",
"#vue/cli-plugin-eslint": "^3.7.0",
"#vue/cli-service": "^3.7.0",
"#vue/eslint-config-prettier": "^4.0.1",
"babel-eslint": "^10.0.1",
"eslint": "^5.16.0",
"eslint-plugin-vue": "^5.0.0",
"vue-template-compiler": "^2.5.21",
"webpack-bundle-tracker": "^0.4.2-beta"
},
"eslintConfig": {
"root": true,
"env": {
"node": true
},
"extends": [
"plugin:vue/essential",
"#vue/prettier"
],
"rules": {},
"parserOptions": {
"parser": "babel-eslint"
}
},
"postcss": {
"plugins": {
"autoprefixer": {}
}
},
"browserslist": [
"> 1%",
"last 2 versions"
]
}
vue.config:
const BundleTracker = require("webpack-bundle-tracker");
module.exports = {
// on Windows you might want to set publicPath: "http://127.0.0.1:8080/"
publicPath: "http://0.0.0.0:8080/",
outputDir: "./dist/",
chainWebpack: config => {
config
.plugin("BundleTracker")
.use(BundleTracker, [{ filename: "./webpack-stats.json" }]);
config.output.filename("bundle.js");
config.optimization.splitChunks(false);
config.resolve.alias.set("__STATIC__", "static");
config.devServer
.hotOnly(true)
.watchOptions({ poll: 1000 })
.https(false)
.disableHostCheck(true)
.headers({ "Access-Control-Allow-Origin": ["*"] });
},
// uncomment before executing 'npm run build'
css: {
extract: {
filename: "bundle.css",
chunkFilename: "bundle.css"
}
}
};