Added docker and readme

docker/Dockerfile

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+FROM python:3.11-slim
+
+WORKDIR /app
+
+# Install system dependencies
+RUN apt-get update && apt-get install -y \
+    gcc \
+    && rm -rf /var/lib/apt/lists/*
+
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY . .
+
+CMD ["python", "main.py"]

docker/docker-compose.yml

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+version: '3.8'
+
+services:
+  bot:
+    build:
+      context: ..
+      dockerfile: docker/Dockerfile
+    container_name: marzban_bot
+    restart: unless-stopped
+    volumes:
+      - ../:/app
+      - ../bot.db:/app/bot.db
+    env_file:
+      - ../.env
+    ports:
+      - "8888:8888"