docs: add note about current AWS CVM issues (v2.12)

docs/versioned_docs/version-2.12/getting-started/first-steps.md

@@ -170,6 +170,20 @@ If you encounter any problem with the following steps, make sure to use the [lat
 
     :::
 
+    :::note
+
+    **AWS**: Currently, confidential VMs may temporarily fail to boot.
+    AWS is actively working on a solution.
+    If creating or initializing a cluster fails, terminate the cluster and try again later.
+    Alternatively, you can use non-confidential Nitro VMs for evaluation purposes.
+    To do so, generate a new configuration with the `aws-nitro-tpm` attestation variant:
+
+    ```bash
+    constellation config generate aws --attestation aws-nitro-tpm
+    ```
+
+    :::
+
 5. Configure kubectl.
 
     ```bash