eslint/prettier config files added

.env

@@ -0,0 +1,3 @@
+# supress error of the eslint latest version with 
+# older packages of create-react-app
+SKIP_PREFLIGHT_CHECK=true

.eslintignore

@@ -0,0 +1 @@
+node_modules/

.eslintrc.json

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+{
+    "env": {
+        "browser": true,
+        "es2021": true
+    },
+    "extends": [
+        "eslint:recommended",
+        "plugin:react/recommended",
+        "plugin:react-hooks/recommended",
+        "plugin:prettier/recommended"
+    ],
+    "parserOptions": {
+        "ecmaFeatures": {
+            "jsx": true
+        },
+        "ecmaVersion": 12,
+        "sourceType": "module"
+    },
+    "plugins": [
+        "react"
+    ],
+    "rules": {
+        "prettier/prettier": "warn",
+        "react/prop-types": "off"
+    }
+}

.prettierrc.json

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+{
+  "arrowParens": "avoid",
+  "bracketSpacing": true,
+  "printWidth": 120,
+  "singleQuote": false,
+  "tabWidth": 2,
+  "trailingComma": "all"
+}