add linting

.eslintrc.json

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

lib/renderer.ts

@@ -31,7 +31,7 @@ async function generateDoc(id: string): Promise<void> {
   }
 }
 
-export default async function (id: string, texDocument: string) {
+export default async function renderer(id: string, texDocument: string) {
   await copyToTemp(id, texDocument)
   await generateDoc(id)
   return id

package.json

@@ -26,6 +26,8 @@
     "@types/uuid": "8.3.0",
     "autoprefixer": "10.2.5",
     "babel-jest": "26.6.3",
+    "eslint": "^7.32.0",
+    "eslint-config-next": "12.0.4",
     "jest": "26.6.3",
     "jest-watch-typeahead": "0.6.1",
     "postcss": "8.2.10",