Deploy preview outside of Vercel, ie. Docker container?

[Tassil0]

Is it possible to deploy the preview using email build somewhere else that is not Vercel? For example a docker container. I have not been able to find out any info about this anywhere. I guess you would need to put output: standalone in the nextjs config, but there's no mention of overriding the default nextjs config in the docs anywhere.

[ayuhito]

I'd love it to use output: 'export' so it can deploy anywhere, such as Cloudflare, GitHub Pages or even an S3 bucket.

Our internal docs infrastructure only supports static files, so it's a shame we can't host this preview server on it since it's a waste to provision an entire server just for a preview that gets a tiny amount of traffic.

[michxymi]

I've tried deploying the React Email preview server to Cloudflare Workers. Ideally, I'd use the preview server's export functionality, but I suspect this isn't possible since it requires server functionality (especially with the integrated send button).

My approach was to:

1. Generate the .react-email folder using the build command from a sample create-email app
2. Add the required dependencies and files as outlined in Cloudflare's Next.js deployment guide (https://developers.cloudflare.com/workers/frameworks/framework-guides/nextjs/)
3. Run the Cloudflare preview command from within this directory

However, I'm receiving errors indicating the email folder can't be found. I believe this occurs because the React Email build command performs certain scaffolding operations that aren't captured when running the Cloudflare preview.