TypeScript backend eslint config

.eslintrc.js

module.exports = {
  root: true,
  parser: "@typescript-eslint/parser",
  parserOptions: {
    project: "./tsconfig.json",
  },
  plugins: ["@typescript-eslint"],
  extends: [
    "eslint:recommended",
    "plugin:@typescript-eslint/recommended",
    "plugin:@typescript-eslint/recommended-requiring-type-checking",
  ],
  rules: {
    "@typescript-eslint/prefer-nullish-coalescing": "error",
    "@typescript-eslint/no-unnecessary-condition": "error",
    "@typescript-eslint/prefer-optional-chain": "error",
  },
};