chore: add nightly mode

[bigint]

What does this PR do?

🤖 Generated by Copilot at c0f4095

This pull request adds a new nightly CI workflow for testing the lenster website against the production servers. It also simplifies the test:nightly script in the package.json file and updates the base URLs in the tests/constants.ts file based on the NIGHTLY environment variable.

Related issues

Fixes # (issue)

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Enhancement (non-breaking small changes to existing functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Explanation of the changes

🤖 Generated by Copilot at c0f4095

• Add a new workflow file for running nightly CI tests on the lenster website (link)
• Simplify the test:nightly script in the package.json file by removing the --nightly flag (link)
• Adjust the base URLs for the web, prerender, and metadata services in the tests/constants.ts file based on the NIGHTLY environment variable (link)

Emoji

🌙🚀🔗

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Updated (UTC)
prerender	✅ Ready (Inspect)	Visit Preview	Apr 12, 2023 5:06am
ui	✅ Ready (Inspect)	Visit Preview	Apr 12, 2023 5:06am
web	✅ Ready (Inspect)	Visit Preview	Apr 12, 2023 5:06am