Add initial project structure for Telegram bot

- Created Docker configuration files for development and production.
- Added Dockerfile for building the bot image.
- Implemented configuration loading from environment variables.
- Developed main application logic and command handlers.
- Included README with setup instructions and usage details.
- Added .gitignore and .dockerignore files to exclude unnecessary files.
- Provided example environment file (.env.example) for bot token configuration.
- Established basic error handling for the bot.

config.py

@@ -0,0 +1,10 @@
+"""Load configuration from environment. Fail fast if BOT_TOKEN is missing."""
+import os
+
+from dotenv import load_dotenv
+
+load_dotenv()
+
+BOT_TOKEN = os.getenv("BOT_TOKEN")
+if not BOT_TOKEN:
+    raise SystemExit("BOT_TOKEN is not set. Copy .env.example to .env and set your token from @BotFather.")