Add Docker/Docker Compose and pin Python dependencies

[Danex-Exe]

Motivation

• Provide a reproducible containerized deployment for the bot to simplify running on hosts and CI.
• Ensure stable runtime by pinning Python dependency versions compatible with the current code.
• Include pm2 support inside the image because the project uses pm2 in documentation and scripts.

Description

• Added a Dockerfile based on python:3.11-slim that installs nodejs, npm and global pm2, installs Python requirements and runs application_start.py.
• Added docker-compose.yml with a bot service that builds the image, mounts the repository into /app, sets working_dir and runs python application_start.py.
• Added .dockerignore to reduce build context and excluded VCS, caches and logs, and updated requirements.txt to pin python-telegram-bot==21.6 and httpx==0.27.2.
• Updated documentation files docs/README.md and docs/ru/README_RU.md with docker compose build/start/logs/stop instructions.

Testing

• Ran python -m py_compile application_start.py telegram_bot.py lib/DataBaze/databaze.py and it succeeded.
• Ran pip install -r requirements.txt and it successfully installed the pinned packages locally.
• Attempted docker compose config but it could not be executed in this environment because docker is not available (command not found).

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Codex Task