Dockerize application

Dockerfile

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+# Use Node.js 20 LTS as the base image
+FROM node:20-slim
+
+# Install dependencies needed for better-sqlite3 (if prebuilt binaries fail)
+RUN apt-get update && apt-get install -y \
+    python3 \
+    make \
+    g++ \
+    && rm -rf /var/lib/apt/lists/*
+
+# Set the working directory
+WORKDIR /usr/src/app
+
+# Copy package files
+COPY package*.json ./
+
+# Install dependencies
+RUN npm install --omit=dev
+
+# Copy the rest of the application code
+COPY . .
+
+# Create the data directory for the database
+RUN mkdir -p data
+
+# The bot uses config.json. In Docker, we'll likely mount this or use env vars, 
+# but for now, we ensure the structure is there.
+
+# Command to run the bot
+CMD [ "node", "main.js" ]