remove unnecessary note and re-work requirements

docs/site/guides/getting-started/add-machines.md

@@ -55,12 +55,12 @@ In the `flake.nix` file:
 
 Adding or configuring a new machine requires two simple steps:
 
+??? Machine Requirements
+  - RAM > 2GB
+
 ???+ Note "Cloud Machines"
   NixOS can cause strange issues when booting in certain cloud environments.
   
-  Find out if your cloud environment:
-  - supports UEFI, if not, use BIOS
-  - has enough RAM (2GB minimum)
   - If on Linode: Make sure that the system uses Direct Disk boot kernel (found in the configuration pannel)
 
 ### Step 1. Identify Target Disk-ID