Enable Next.js lint

.eslintrc.json

@@ -0,0 +1,3 @@
+{
+  "extends": "next/core-web-vitals"
+}

package.json

@@ -7,7 +7,8 @@
     "dev": "next",
     "build": "next build",
     "start": "next start",
-    "export": "next export"
+    "export": "next export",
+    "lint": "next lint"
   },
   "repository": {
     "type": "git",
@@ -54,6 +55,8 @@
     "@types/node": "^15.6.0",
     "@types/react": "^17.0.6",
     "babel-plugin-inline-react-svg": "^2.0.1",
+    "eslint": "7.32.0",
+    "eslint-config-next": "11.1.2",
     "typescript": "^4.2.4"
   }
 }