minor fix

Author: danciaclara

self-hosting/methods/docker-compose.mdx

@@ -9,7 +9,7 @@ Plane One and Plane Pro are enabled on this edition, so the Free plan on this ed
 
 ### Prerequisites
 
-   - A virtual or on-prem machine with at least 2 vCPUs and 8 GB RAM
+   - A virtual or on-prem machine with at least 2 vCPUs and 4 GB RAM (8 GB RAM recommended)
    - `x64` AKA `AMD 64` or `AArch 64` AKA `ARM 64` CPUs
    - Supported operating systems:
       - Ubuntu