chore(build): do not run next export

- this is allowed thanks to Netlify's Nextjs runtime plugin

.gitignore

@@ -1,4 +1,3 @@
 node_modules
 .next
-out
 coverage

package.json

@@ -4,7 +4,7 @@
   "private": true,
   "scripts": {
     "dev": "next dev",
-    "build": "next build && next export",
+    "build": "next build",
     "start": "next start",
     "lint": "next lint",
     "format": "prettier --write \"**/*.{ts,tsx,md}\"",