feat: add cloudron-mcp validation

Build and validate Cloudron MCP server for self-hosted app management.

Changes:
- docker-compose.yml: Updated to use custom Dockerfile for cloudron-mcp
- dockerfiles/cloudron-mcp/Dockerfile: Added custom Dockerfile with fix
  for CMD entry point (dist/server.js instead of dist/index.js)
- STATUS.md: Added cloudron-mcp as validated MCP (v0.1.0, 374MB)

Validation:
- Container builds successfully from TypeScript source (374MB)
- Fixed Dockerfile CMD to use correct entry point (dist/server.js)
- MCP protocol handshake verified with initialize request
- Protocol version 2024-11-05 confirmed
- Server name: cloudron-mcp, version 0.1.0
- Requires CLOUDRON_URL environment variable
- Tested with proper --name flag for container

dockerfiles/cloudron-mcp/Dockerfile

@@ -0,0 +1,14 @@
+FROM node:22-alpine
+
+WORKDIR /app
+
+COPY package.json package-lock.json* ./
+
+RUN npm ci
+
+COPY . .
+
+EXPOSE 3000
+
+# Use correct entry point from package.json bin
+CMD ["node", "dist/server.js"]