feat: Implement Tarot session management and reading spreads

- Added TarotSessionManager class to manage tarot reading sessions, including session creation, retrieval, reading addition, and cleanup of old sessions.
- Defined various tarot spreads in a new spreads module, including single card, three card, Celtic cross, and more, with detailed descriptions and meanings for each position.
- Created core types for tarot cards, readings, and sessions in a new types module to structure data effectively.
- Configured TypeScript settings in tsconfig.json for improved development experience and compatibility.

Dockerfile

@@ -0,0 +1,35 @@
+# Use Node.js 18 Alpine for smaller image size
+FROM node:18-alpine
+
+# Set working directory
+WORKDIR /app
+
+# Copy package files
+COPY package*.json ./
+
+# Install dependencies
+RUN npm ci --only=production
+
+# Copy source code
+COPY . .
+
+# Build the TypeScript code
+RUN npm run build
+
+# Create non-root user for security
+RUN addgroup -g 1001 -S nodejs
+RUN adduser -S tarot -u 1001
+
+# Change ownership of the app directory
+RUN chown -R tarot:nodejs /app
+USER tarot
+
+# Expose port 3000
+EXPOSE 3000
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+  CMD node -e "require('http').get('http://localhost:3000/health', (res) => { process.exit(res.statusCode === 200 ? 0 : 1) })"
+
+# Default command - run HTTP server
+CMD ["node", "dist/index.js", "--transport", "http", "--port", "3000"]