Add Docker scripts and validation tests for Zen MCP Server

- Created build.sh script for building the Docker image with environment variable checks.
- Added deploy.sh script for deploying the Zen MCP Server with health checks and logging.
- Implemented healthcheck.py to verify server process, Python imports, log directory, and environment variables.
- Developed comprehensive tests for Docker configuration, environment validation, and integration with MCP.
- Included performance tests for Docker image size and startup time.
- Added validation script tests to ensure proper Docker and MCP setup.

docker/scripts/build.sh

@@ -0,0 +1,41 @@
+#!/bin/bash
+set -euo pipefail
+
+# Colors for output
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+RED='\033[0;31m'
+NC='\033[0m'
+
+echo -e "${GREEN}=== Building Zen MCP Server Docker Image ===${NC}"
+
+# Check if .env file exists
+if [[ ! -f .env ]]; then
+    echo -e "${YELLOW}Warning: .env file not found. Copying from .env.example${NC}"
+    if [[ -f .env.example ]]; then
+        cp .env.example .env
+        echo -e "${YELLOW}Please edit .env file with your API keys before running the server${NC}"
+    else
+        echo -e "${RED}Error: .env.example not found${NC}"
+        exit 1
+    fi
+fi
+
+# Build the Docker image
+echo -e "${GREEN}Building Docker image...${NC}"
+docker-compose build --no-cache
+
+# Verify the build
+if docker images | grep -q "zen-mcp-server"; then
+    echo -e "${GREEN}✓ Docker image built successfully${NC}"
+    echo -e "${GREEN}Image details:${NC}"
+    docker images | grep zen-mcp-server
+else
+    echo -e "${RED}✗ Failed to build Docker image${NC}"
+    exit 1
+fi
+
+echo -e "${GREEN}=== Build Complete ===${NC}"
+echo -e "${YELLOW}Next steps:${NC}"
+echo -e "  1. Edit .env file with your API keys"
+echo -e "  2. Run: ${GREEN}docker-compose up -d${NC}"