improve documentation (!101)

* fix

* doc(end2end): detail test users

* doc(all): update docker tag

update docker image name from 0.2.0 to 0.3.0
use "docker compose" everywhere instead of "docker-compose"
improve table of content
fix layout

* doc(all): improve docs

add logo to readme
add table of content
rewording
complete

* doc(all): fix typos