.eslintrc.json

{
  "extends": ["eslint:recommended", "plugin:node/recommended", "prettier"],
  "plugins": ["node", "prettier"],
  "rules": {
    "prettier/prettier": "error",
    "block-scoped-var": "error",
    "eqeqeq": "error",
    "no-warning-comments": "warn",
    "no-var": "error",
    "prefer-const": "error",
    "eol-last": "error"
  },
  "overrides": [
    {
      "files": "**/*.ts",
      "parser": "@typescript-eslint/parser",
      "extends": ["plugin:@typescript-eslint/recommended"],
      "rules": {
        "@typescript-eslint/no-non-null-assertion": "off",
        "@typescript-eslint/no-use-before-define": "off",
        "@typescript-eslint/explicit-module-boundary-types": "off",
        "@typescript-eslint/no-unused-vars": "off",
        "node/no-missing-import": "off",
        "node/no-unsupported-features/es-syntax": "off"
      },
      "parserOptions": {
        "ecmaVersion": 2019,
        "sourceType": "module"
      }
    }
  ]
}