feat(paseo): preinstall nano and set the git identity from the environment

GIT_NAME and GIT_EMAIL expand into the four GIT_AUTHOR_*/GIT_COMMITTER_*
variables, the same shape code-server already uses. Passing the identity as
environment rather than running `git config` means agents and terminals commit
correctly with no setup step, and it does not depend on ~/.gitconfig surviving
in the /home/paseo volume.

paseo/.env.example

@@ -25,6 +25,12 @@ PASEO_LABEL=paseo
 # Timezone for logs and agent shells.
 TZ=Asia/Ho_Chi_Minh
 
+# Git identity for agents and terminals, as author and committer. These reach
+# git as environment variables, so they need no `git config` and survive a
+# rebuild -- unlike a ~/.gitconfig, which only lives in the /home/paseo volume.
+GIT_NAME=tiennm99
+GIT_EMAIL=tiennm99@outlook.com
+
 # Shell for Paseo's terminals. Paseo reads $SHELL and falls back to /bin/sh
 # (dash), ignoring the user's login shell, so set it here rather than running
 # chsh -- which would be reverted by the next rebuild anyway.