Fix chat_id assignment in echo handler to use user's interlocutor

Add utility functions for schema validation of message content types

Refactor message handling to use common content types and streamline reply logic

Merge pull request #7 from InWamos/main

update config reader to match new variables and new .env path

Merge pull request #1 from InWamos/dev

Upd README to explain how to run docker containers

mongo-express login + password added to the config

update config reader to match new variables and new .env path

docker files

add clearer comment

.env for the new env file location

Move .env to project's root directory

updated

moved to keyboards