fix(react-email): Add Windows support for build process

[chuanxshi]

Description

This PR addresses compatibility issues with the build process on Windows systems by adding support for Windows-specific executables. Previously, the build script utilized the Unix-like next executable, which isn't compatible with Windows environments. This fix ensures that the correct executable (next.cmd) is used based on the operating system.

Changes

• Updated build-preview-server.mjs to detect the operating system.
• Utilized next.cmd for Windows and next for Unix-like systems.
• Ensured proper handling of build artifacts across different environments.

Motivation and Context

Developers using Windows encountered errors when attempting to run the build process due to the incorrect executable being invoked. This fix ensures a seamless build experience across all major operating systems.

How Has This Been Tested?

• Windows:
  • Ran the build script and verified that the project builds successfully.
  • Ensured that the dist/preview/.next directory is correctly populated.
• Unix/Linux/Mac:
  • Confirmed that existing build processes remain unaffected and continue to function as expected.

Types of Changes

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• My code follows the code style of this project.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings/errors.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 5bbbb55

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[vercel]

@chuanxshi is attempting to deploy a commit to the resend Team on Vercel.

A member of the Team first needs to authorize it.

[gabrielmfern]

Hey, thank you so much for this PR! A lot of details always get past testing and are only seen when trying to contribute or running a specific edge-case, so I appreciate the help!

Added a few minor comments for us to improve this together

[chuanxshi]

@gabrielmfern I’ve made the updates based on the feedback. Please take a look when you have a moment. Thank you!