.eslintrc.json

{
  "env": {
      "es6": true,
      "node": true
  },
  "extends": [
    "eslint:recommended",
    "plugin:node/recommended"
  ],
  "parserOptions": {
      "sourceType": "module"
  },
  "ignorePatterns": [
    "web/"
  ],
  "overrides": [
    {
      "files": ["./backend/**/*.js", "./backend/**/*.ts"],
      "extends": [
        "plugin:@typescript-eslint/recommended"
      ],
      "parser": "@typescript-eslint/parser",
      "rules": {
        "@typescript-eslint/no-non-null-asserted-optional-chain": "off",
        "@typescript-eslint/no-non-null-assertion": "off",
        "@typescript-eslint/no-use-before-define": "off",
        "@typescript-eslint/no-warning-comments": "off",
        "@typescript-eslint/no-empty-function": "off",
        "@typescript-eslint/no-explicit-any": "off",
        "@typescript-eslint/no-var-requires": "off",
        "@typescript-eslint/explicit-function-return-type": "off",
        "@typescript-eslint/explicit-module-boundary-types": "off",
        "@typescript-eslint/camelcase": "off",
        "@typescript-eslint/interface-name-prefix": "off",
        "node/no-missing-import": "off",
        "node/no-empty-function": "off",
        "node/no-unsupported-features/es-syntax": "off",
        "node/no-missing-require": "off",
        "node/no-unpublished-import": "warn",
        "node/shebang": "off",
        "no-dupe-class-members": "off",
        "require-atomic-updates": "off"
      }
    }
  ],
  "rules": {
    "block-scoped-var": "error",
    "eqeqeq": ["error", "always", {"null": "ignore"}],
    "no-var": "error",
    "semi": "error",
    "indent": ["error", 2, { "SwitchCase": 1 }],
    "no-tabs": "error",
    "prefer-const": "error",
    "eol-last": "error",
    "prefer-arrow-callback": "error",
    "no-constant-condition": "off",
    "no-process-exit": "off",
    "no-trailing-spaces": "error",
    "quotes": ["warn", "single", { "avoidEscape": true }]
  }
}