docs(size-profiles): Add hardware requirements section

docs/size-profiles.md

@@ -22,13 +22,25 @@ These profiles were created with some assumptions in mind:
 As user profiles can vary significantly between different instances, you may want to adjust these values.
 For information on adjusting values, refer to the [scaling](./scaling.md) documentation for openDesk.
 
+# Hardware Requirements
+
+The following table provides an overview of CPU and memory requirements, including [external services](./external-services.md).
+The available memory in the cluster should be between the request and limit values. Actual memory utilization varies depending on usage patterns but will unlikely consume the complete setup limit.
+
+| **Profile** | CPUs | Memory (Gi), request | Memory (Gi), limit |
+|-------------|------|----------------------|--------------------|
+|     **500** |  >25 |                   32 |                141 |
+|      **5k** |  >54 |                   86 |                551 |
+|     **50k** | >206 |                  422 |               2058 |
+|    **100k** | >336 |                  711 |               3418 |
+
 # Location
 
 `/helmfile/environments/default-size-<max-user-profile>-overrides/`
 
 # Deployment
 
-Set the environment variable `OPENDESK_SIZE` to `500`, `5k`, `50k`, or `100k` when using helmfile to use one profile.
+Set the environment variable `SIZE_PROFILE` to `500`, `5k`, `50k`, or `100k` when using helmfile to use one profile.
 
 # Notes