Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/3369

Added the system promt variable and added a bit information for beginners

added an extra step to creating the chatgpt bot so it can read encrypted messages

Co-Authored-By: Slavi Pantaleev <slavi@devture.com>