refactor: use hostname instead of variable

containers/base/config/bashrc

@@ -10,7 +10,7 @@ export EDITOR=nvim \
   XDG_RUNTIME_DIR=/run/user/1000 \
   SSH_AUTH_SOCK=/run/user/1000/ssh-auth-sock \
   DBUS_SESSION_BUS_ADDRESS="unix:path=/tmp/bus" \
-  PS1="\[\e[30;46m\] $CONTAINER_NAME | \w \[\e[0;36m\]\[\e[m\] " \
+  PS1="\[\e[30;46m\] \h | \w \[\e[0;36m\]\[\e[m\] " \
   TZ="Europe/Amsterdam"
 
 # === aliases and functions ===