TypeScript MCP Server Template

# Docker Changes Summary This document summarizes all the changes made to fix Docker issues and improve the containerization setup. ## 📋 Changes Made ### 1. **Dockerfile Improvements** #### **Security Fixes:** - ✅ **Uncommented `USER nodejs`** - Container now runs as non-root user - ✅ **Added proper user creation** - Created nodejs user with specific UID/GID - ✅ **Added security comments** - Documented why each security measure is important #### **Script Issues Fixed:** - ✅ **Changed CMD from `npm start` to `npm run start:docker`** - Avoids prestart script issues - ✅ **Added detailed comments** - Explained the npm script problem and solution - ✅ **Added curl installation** - Required for healthcheck functionality #### **Environment Variables:** - ✅ **Removed duplicate ENV declarations** - Eliminated redundant PORT and HOSTNAME variables - ✅ **Added explanatory comments** - Documented the purpose of each environment variable ### 2. **Package.json Updates** #### **New Scripts:** - ✅ **Added `start:docker` script** - Separate script without prestart hooks - ✅ **Maintained existing scripts** - Kept original scripts for local development #### **Problem Solved:** - **Issue**: `npm start` has a `prestart` script that runs `npm run build` - **Problem**: TypeScript not available in Docker production stage - **Solution**: Created `start:docker` script without hooks ### 3. **Docker Compose Improvements** #### **Healthcheck Fix:** - ✅ **Changed from `wget` to `curl`** - Alpine Linux compatibility - ✅ **Added detailed comments** - Explained healthcheck configuration - ✅ **Removed obsolete version** - Eliminated Docker Compose version warning #### **Configuration Comments:** - ✅ **Added inline comments** - Explained each configuration option - ✅ **Documented best practices** - Added explanations for security and performance settings ### 4. **Docker Ignore Optimization** #### **Enhanced Exclusions:** - ✅ **Added comprehensive comments** - Explained why each exclusion is important - ✅ **Security considerations** - Documented environment file exclusions - ✅ **Performance optimization** - Explained build context optimization ### 5. **Documentation Created** #### **New Documentation Files:** - ✅ **[DOCKER_TROUBLESHOOTING.md](DOCKER_TROUBLESHOOTING.md)** - Detailed troubleshooting guide - ✅ **[DOCKER_BEST_PRACTICES.md](DOCKER_BEST_PRACTICES.md)** - Comprehensive best practices guide - ✅ **[DOCKER_CHANGES_SUMMARY.md](DOCKER_CHANGES_SUMMARY.md)** - This summary document #### **README Updates:** - ✅ **Added Docker documentation links** - Referenced new troubleshooting and best practices guides - ✅ **Updated project structure** - Included new documentation files - ✅ **Added key improvements section** - Highlighted major fixes and improvements ## 🔧 Technical Issues Resolved ### 1. **NPM Script Hook Problem** ```bash # ❌ Before: This caused TypeScript help to display CMD ["npm", "start"] # ✅ After: This runs the server directly CMD ["npm", "run", "start:docker"] ``` ### 2. **Security Vulnerability** ```dockerfile # ❌ Before: Container running as root # USER nodejs # ✅ After: Container running as non-root user USER nodejs ``` ### 3. **Healthcheck Failure** ```yaml # ❌ Before: wget not available in Alpine healthcheck: test: ["CMD", "wget", "--spider", "http://localhost:3000/health"] # ✅ After: curl available and working healthcheck: test: ["CMD", "curl", "-f", "http://localhost:3000/health"] ``` ### 4. **Build Performance** ```dockerignore # ✅ Added comprehensive .dockerignore # Excludes unnecessary files for faster builds node_modules dist .env* .git README.md *.log ``` ## 📊 Results Achieved ### **Before Changes:** - ❌ Container showing TypeScript help instead of running server - ❌ Container running as root user (security risk) - ❌ Healthcheck failing due to missing wget - ❌ Duplicate environment variables - ❌ No documentation for Docker issues ### **After Changes:** - ✅ Container running server successfully - ✅ Container running as non-root user (secure) - ✅ Healthcheck working properly - ✅ Clean environment variable configuration - ✅ Comprehensive documentation for future reference ## 🧪 Testing Results ### **Build Test:** ```bash docker build -t ts-template-mcp . # ✅ Build successful with multi-stage optimization ``` ### **Runtime Test:** ```bash docker-compose up -d docker-compose ps # ✅ Container status: Up and healthy ``` ### **Healthcheck Test:** ```bash curl http://localhost:3000/health # ✅ Response: {"status":"ok",...} ``` ### **Security Test:** ```bash docker exec -it container_name whoami # ✅ Result: nodejs (non-root user) ``` ## 🎯 Key Learnings ### **1. NPM Scripts in Docker** - Always check for prestart/poststart scripts - Create Docker-specific scripts without hooks - Test scripts in containerized environment ### **2. Alpine Linux Considerations** - Use `curl` instead of `wget` for healthchecks - Install required packages explicitly - Consider Alpine-specific limitations ### **3. Security Best Practices** - Always run containers as non-root users - Use minimal base images - Implement proper healthchecks ### **4. Documentation Importance** - Document issues and solutions for future reference - Create troubleshooting guides - Maintain best practices documentation ## 🚀 Future Recommendations ### **Immediate:** - ✅ All critical issues resolved - ✅ Documentation complete - ✅ Security improvements implemented ### **Next Steps:** - Consider implementing resource limits - Add security scanning to CI/CD - Implement proper logging strategy - Consider using Docker BuildKit for faster builds ## 📝 Files Modified ### **Core Files:** - `Dockerfile` - Multi-stage build with security improvements - `package.json` - Added Docker-specific script - `docker-compose.yml` - Fixed healthcheck and removed obsolete version - `.dockerignore` - Enhanced with comprehensive exclusions ### **Documentation:** - `README.md` - Added Docker documentation links - `DOCKER_TROUBLESHOOTING.md` - New troubleshooting guide - `DOCKER_BEST_PRACTICES.md` - New best practices guide - `DOCKER_CHANGES_SUMMARY.md` - This summary document ## ✅ Conclusion All Docker issues have been successfully resolved with comprehensive documentation added. The containerization setup now follows best practices and includes detailed troubleshooting guides for future reference. **Status: ✅ Complete and Tested**