Add Docker MCP Toolkit integration with dynamic installation support

.dockerignore

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+# Dependencies
+node_modules/
+npm-debug.log
+yarn-debug.log
+yarn-error.log
+# Note: package-lock.json is needed for npm ci
+
+# Build outputs
+# Note: dist/ needed for prebuilt Dockerfile
+*.tsbuildinfo
+
+# Development files
+.git/
+.github/
+.vscode/
+.idea/
+
+# Test files
+coverage/
+*.test.ts
+*.spec.ts
+test/
+tests/
+
+# Documentation (copied selectively)
+documentation/
+ROADMAP.md
+CONTRIBUTING.md
+CODE_OF_CONDUCT.md
+TROUBLESHOOTING.md
+CHANGELOG.md
+
+# Environment files
+.env
+.env.local
+.env.*.local
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Temporary files
+tmp/
+temp/
+*.tmp
+*.log
+
+# Docker files (to avoid recursion)
+docker/
+Dockerfile
+.dockerignore
+
+# Database files (should not be in image)
+*.db
+*.db-*
+.context-sync/