added docker

Dockerfile

@@ -0,0 +1,29 @@
+# Dockerfile for Excommunicado Discord Bot
+FROM python:3.12-slim
+
+# Set working directory
+WORKDIR /app
+
+# Install system dependencies (if needed)
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    build-essential \
+    && rm -rf /var/lib/apt/lists/*
+
+# Copy requirements first (better layer caching)
+COPY requirements.txt .
+
+# Install Python dependencies
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy the rest of the application
+COPY . .
+
+# Create data directory for persistence
+RUN mkdir -p /app/data
+
+# Create non-root user for security
+RUN useradd -m botuser && chown -R botuser:botuser /app
+USER botuser
+
+# Run the bot
+CMD ["python", "bot.py"]