build: add eslint configuration

.eslintrc.js

+module.exports = {
+  root: true,
+  parser: '@typescript-eslint/parser',
+  plugins: [
+    '@typescript-eslint',
+  ],
+  extends: [
+    'eslint:recommended',
+    'plugin:@typescript-eslint/recommended',
+  ],
+};

package.json

@@ -26,14 +26,17 @@
     "extends": "react-app"
   },
   "devDependencies": {
+    "@types/better-sqlite3": "^7.5.0",
     "@types/node": "^17.0.31",
+    "@typescript-eslint/eslint-plugin": "^5.22.0",
+    "@typescript-eslint/parser": "^5.22.0",
     "babel-eslint": "^10.0.1",
-    "eslint": "^5.12.1",
+    "eslint": "^8.14.0",
     "eslint-config-react-app": "^3.0.6",
-    "eslint-plugin-flowtype": "^3.2.1",
     "eslint-plugin-import": "^2.14.0",
     "eslint-plugin-jsx-a11y": "^6.1.2",
-    "eslint-plugin-react": "^7.12.4"
+    "eslint-plugin-react": "^7.12.4",
+    "typescript": "^4.6.4"
   },
   "prettier": {
     "singleQuote": true,