update home doc

docs/index.md

@@ -23,6 +23,17 @@ Github spending limit is always zero by default. That means you remain in full c
 
 ## Set Required Tokens Before You Start
 
+Tokens can be generated by registered Arista customers and employees under arista.com profile settings. However any user registred on arista.com can download cEOS-lab image and upload it to the Codespace manually by right clicking VSCode `Explorer` tab and selecting `Upload`.  
+Once the image is uploaded, it has to be imported into Docker with the name and the tag specified in the Containerlab definition for the specific demo environment.
+
+Example:
+
+```bash
+docker import cEOS-lab-4.30.6M.tar.xz arista/ceos:4.30.6M
+```
+
+It's not as convenient as using tokens, but is a small price to pay to start and amazing lab! 😄
+
 !!! Danger "Danger"
 
     ==**Do NOT set your tokens under the repository settings!**== :skull_and_crossbones:{ .heartbeat }  
@@ -51,7 +62,7 @@ Please access the corresponding documentation section to start the demo and acce
 
 !!! Info
 
-    Codespaces have 30 minutes inactivity timeout.
+    Codespaces have 30 minutes idle timeout by default. If required, this timeout can be changed under your Github account > `Settings` > `Codespaces` > `Default idle timeout`. You can also change the `Default retention period` there if required. To avoid stortage charges when Codespace is not running, it's feasible to reduce the `Default retention period` to 1 day.
 
 !!! Tip