feat: update docker-compose.yml

docs: update readme.md

docs: fix typos

docs: fix typos

docs: add 'features' paragraph

docs: update readme (installation, testing)

feat: add docker-compose.yml

feat: update submodules

docs: add gallery to readme

docs: update description of architecture and overview

docs: update stack in readme

docs: add gif to readme.md

docs: update header of readme

docs: update image of app architecture

docs: add a picture of the app architecture