feat: added new express runtime for selfhosted vps and vms

[thecodacus]

Add Express Server Runtime

Overview

This PR adds a new Express-based runtime option to run the server build, providing an alternative to the default Cloudflare runtime. This enables developers to run the application in a more traditional Node.js environment for local development and testing.

Key Changes

1. New Express Runtime

• Added a new bolt-diy-express runtime in the runtimes directory
• Created npm scripts to build and run the Express runtime: runtime:express_build and runtime:express
• Implemented a standalone Express server that serves the Remix application

2. Server Entry Point Modifications

• Updated app/entry.server.tsx to use react-dom/server.browser instead of react-dom/server
• Added TypeScript ignores and type annotations to resolve compilation issues

Technical Details

bolt-diy-express Runtime

Key technical implementation details:

• Uses Express.js to serve the Remix application
• Dynamically imports the Remix build at runtime
• Serves static files from the client build directory
• Handles all routes through the Remix request handler

System Changes

• Added TypeScript configuration for the new runtime
• Updated project structure to accommodate multiple runtime options
• Modified the root tsconfig.json to exclude the runtimes directory

Migration Impact

• No breaking changes - the default Cloudflare runtime still works as before
• The Express runtime can be used optionally by running pnpm runtime:express_build followed by pnpm runtime:express
• Server runs on port 5173 by default (configurable via PORT environment variable)

Usage Steps

To leverage the new Express runtime:

1. Build the application with Remix:

   pnpm build

2. Build the Express runtime:

   pnpm runtime:express_build

3. Start the Express server:

   pnpm runtime:express

4. Access your application at http://localhost:5173

You can also customize the port by setting the PORT environment variable:

PORT=3000 pnpm runtime:express

Future Improvements

• Add comprehensive documentation for the Express runtime
• Add configuration options for server port, host, etc.
• Implement hot reloading for the Express runtime
• Add environment variable handling

Documentation Updates

• Documentation changes will be addressed in a future PR