Webpack does not update page content when building, how to fix?

Question

webpack

I have the following project:
package.json:

{
  "name": "frontend",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "dev": "webpack --mode development ./src/index.js --output-path ./static/frontend/",
    "build": "webpack --mode production ./src/index.js --output-path ./static/frontend/"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "@babel/core": "^7.14.6",
    "@babel/preset-env": "^7.14.7",
    "@babel/preset-react": "^7.14.5",
    "babel-loader": "^8.2.2",
    "react": "^17.0.2",
    "react-dom": "^17.0.2",
    "webpack": "^5.44.0",
    "webpack-cli": "^4.7.2"
  },
  "dependencies": {
    "axios": "^0.21.1"
  }
}

webpack.config.js

{
  "name": "frontend",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "dev": "webpack --mode development ./src/index.js --output-path ./static/frontend/",
    "build": "webpack --mode production ./src/index.js --output-path ./static/frontend/"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "@babel/core": "^7.14.6",
    "@babel/preset-env": "^7.14.7",
    "@babel/preset-react": "^7.14.5",
    "babel-loader": "^8.2.2",
    "react": "^17.0.2",
    "react-dom": "^17.0.2",
    "webpack": "^5.44.0",
    "webpack-cli": "^4.7.2"
  },
  "dependencies": {
    "axios": "^0.21.1"
  }
}

When you run the npm run dev command, the updates are collected in the main.js file.
But when you restart the server, no changes are visible on the page, as if it were loading the old file (I tried to delete it manually - anyway)
Tell me what to do?