fix: remove upper range node.js version check

server/index.js

@@ -8,14 +8,6 @@ const { nanoid } = require('nanoid')
 const { DateTime } = require('luxon')
 const { gte } = require('semver')
 
-// ----------------------------------------
-// Check Node.js version
-// ----------------------------------------
-if (gte(process.version, '21.0.0')) {
-  console.error('You\'re using an unsupported Node.js version. Please read the requirements.')
-  process.exit(1)
-}
-
 // ----------------------------------------
 // Init WIKI instance
 // ----------------------------------------