docs: Fix nix flake check problem with diskId

docs/site/getting-started/configure.md

@@ -199,21 +199,6 @@ If you only want to setup a single machine at this point, you can delete `sara`
 git rm ./machines/sara
 ```
 
-### Step 5: Check Configuration
-
-Validate your configuration by running:
-
-```bash
-nix flake check
-```
-
-This command helps ensure that your system configuration is correct and free from errors.
-
-!!! Tip
-
-    You can integrate this step into your [Continuous Integration](https://en.wikipedia.org/wiki/Continuous_integration) workflow to ensure that only valid Nix configurations are merged into your codebase.
-
-
 ---
 
 ## Whats next?

docs/site/getting-started/secrets.md

@@ -55,7 +55,35 @@ sops/
 ```
 If you followed the quickstart tutorial all necessary secrets are initialized at this point.
 
----
+
+
+### Generate Facts and Vars
+
+Typically, this step is handled automatically when a machine is deployed. However, to enable the use of `nix flake check` with your configuration, it must be completed manually beforehand.
+
+Currently, generating all the necessary facts requires two separate commands. This is due to the coexistence of two parallel secret management solutions: the older, stable version (`clan secrets` and `clan facts`) and the newer, experimental version (`clan vars`).
+
+To generate both facts and vars, execute the following commands:
+
+```sh
+clan facts generate && clan vars generate
+```
+
+
+### Check Configuration
+
+Validate your configuration by running:
+
+```bash
+nix flake check
+```
+
+This command helps ensure that your system configuration is correct and free from errors.
+
+!!! Tip
+
+    You can integrate this step into your [Continuous Integration](https://en.wikipedia.org/wiki/Continuous_integration) workflow to ensure that only valid Nix configurations are merged into your codebase.
+
 
 ## Whats next?