feat: add Railway deployment with zero-config setup

Dockerfile.railway

@@ -65,11 +65,16 @@ RUN addgroup -g 1001 -S nodejs && \
     chown -R nodejs:nodejs /app
 USER nodejs
 
-# Set environment variables
+# Set Railway-optimized environment variables
+ENV AUTH_TOKEN="REPLACE_THIS_AUTH_TOKEN_32_CHARS_MIN_abcdefgh"
 ENV NODE_ENV=production
 ENV IS_DOCKER=true
 ENV MCP_MODE=http
 ENV USE_FIXED_HTTP=true
+ENV LOG_LEVEL=info
+ENV TRUST_PROXY=1
+ENV HOST=0.0.0.0
+ENV CORS_ORIGIN="*"
 
 # Expose port (Railway will set PORT automatically)
 EXPOSE 3000