🔧 Add eslint/prettier configuration files

.eslintignore

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+.eslintrc

.eslintrc

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+{
+  "root": true,
+  "env": {
+    "node": true
+  },
+  "parser": "@typescript-eslint/parser",
+  "parserOptions": {
+    "ecmaVersion": 2021,
+    "sourceType": "module"
+  },
+  "plugins": ["@typescript-eslint", "prettier"],
+  "extends": [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/recommended",
+    "prettier"
+  ],
+  "rules": {
+    "no-promise-executor-return": ["error"],
+    "no-template-curly-in-string": ["error"],
+    "require-atomic-updates": ["error"],
+    "accessor-pairs": ["error"],
+    "array-callback-return": ["error"],
+    "class-methods-use-this": ["error"],
+    "consistent-return": ["error"],
+    "curly": ["error", "all"],
+    "default-case": ["error"],
+    "default-case-last": ["error"],
+    "default-param-last": ["error"],
+    "dot-location": ["error", "property"],
+    "dot-notation": ["error"],
+    "eqeqeq": ["error"],
+    "max-classes-per-file": ["error", 1],
+    "no-alert": ["error"],
+    // TODO: log using pino and enable this rule later on
+    // "no-console": ["error"],
+    "no-constructor-return": ["error"],
+    "no-else-return": ["error"],
+    "no-empty-function": ["error"],
+    "no-empty-pattern": ["error"],
+    "no-magic-numbers": ["warn"],
+    "no-multi-spaces": ["error"],
+    "no-multi-str": ["error"],
+    "no-new": ["error"],
+    "no-return-assign": ["error"],
+    "no-return-await": ["error"],
+    "no-self-compare": ["error"],
+    "no-unused-expressions": ["error"],
+    "no-useless-concat": ["error"],
+    "no-useless-return": ["error"],
+    "require-await": ["error"],
+    "no-label-var": ["error"],
+    "no-undefined": ["error"],
+    "no-use-before-define": ["error"],
+    "no-duplicate-imports": ["error"],
+    "no-useless-computed-key": ["error"],
+    "no-useless-constructor": ["error"],
+    "no-var": ["error"],
+    "object-shorthand": ["error"],
+    "prefer-const": ["error"],
+    "prefer-template": ["error"]
+  }
+}

.prettierrc

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+{
+  "$schema": "http://json.schemastore.org/prettierrc",
+  "printWidth": 80,
+  "tabWidth": 2,
+  "useTabs": false,
+  "semi": true,
+  "singleQuote": false,
+  "quoteProps": "as-needed",
+  "trailingComma": "es5",
+  "bracketSpacing": true,
+  "htmlWhitespaceSensitivity": "css",
+  "endOfLine": "lf",
+  "embeddedLanguageFormatting": "off"
+}