docs: update node version

Signed-off-by: Wing-Kam Wong <wingkwong.code@gmail.com>

packages/noco-docs/content/en/getting-started/installation.md

@@ -12,7 +12,7 @@ Simple installation - takes about three minutes!
 ## Prerequisites
 
 - Must haves
-    - [Node.js with version >= 12](https://nodejs.org/en/download) / [Docker](https://www.docker.com/get-started)
+    - [Node.js with version >= 14](https://nodejs.org/en/download) / [Docker](https://www.docker.com/get-started)
 - Nice to haves
     - [MySQL](https://dev.mysql.com/downloads/mysql/) / [Postgres](https://www.postgresql.org/download/) / [SQL Server](https://www.microsoft.com/en-gb/sql-server/sql-server-downloads) / SQLite Database
     - Existing schemas can help to create APIs quickly.