adds notes about terminal session preparation

the goal here is to have the same configuration as the users, with my normal
configuration especially git merge was extremely problematic. the prompt should
also be cleaned up so there is less clutter on the screen.

basics.html

@@ -30,6 +30,10 @@
             ## for beginner-level git users
 
             notes:
+            - terminal session preparation:
+              - two terminals each with same tmux session, check font size
+              - remove user, host and path from prompt
+              - clean git config for demo
             - close your laptops
             - hand out cheat sheets later, no need to write stuff down
             - if you have questions feel free to interrupt