feat: verify environment variables

[TinsFox]

Description

Use @t3-oss/env-core zod to verify environment variables. When the environment variables fail to be read, an error will be reported when starting the project, ensuring the integrity of the necessary parameters required when the project is started.

At the same time, the environment variables exposed on the body have been removed and exposed through the recommended method of nextjs.

dify/web/app/layout.tsx

Lines 39 to 44 in 13cd409

	data-api-prefix={process.env.NEXT_PUBLIC_API_PREFIX}
	data-pubic-api-prefix={process.env.NEXT_PUBLIC_PUBLIC_API_PREFIX}
	data-public-edition={process.env.NEXT_PUBLIC_EDITION}
	data-public-sentry-dsn={process.env.NEXT_PUBLIC_SENTRY_DSN}
	data-public-maintenance-notice={process.env.NEXT_PUBLIC_MAINTENANCE_NOTICE}
	data-public-site-about={process.env.NEXT_PUBLIC_SITE_ABOUT}

⚠️ I may need someone to help me check what these two environment variables do.

dify/web/app/layout.tsx

Lines 43 to 44 in 13cd409

	data-public-maintenance-notice={process.env.NEXT_PUBLIC_MAINTENANCE_NOTICE}
	data-public-site-about={process.env.NEXT_PUBLIC_SITE_ABOUT}

Type of Change

Please delete options that are not relevant.

• Improvement, including but not limited to code refactoring, performance optimization, and UI/UX improvement
• Dependency upgrade, two new dependencies have been added, @t3-oss/env-core and zod

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

There are no destructive updates. Although environment variables need to be checked, a default .env file is generated during installation. This modification can be said to only add a type hint to the environment variable.

Suggested Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• I ran dev/reformat(backend) and cd web && npx lint-staged(frontend) to appease the lint gods

[TinsFox]

This will cause .env.example to overwrite .env after each installation. I need to think again

[TinsFox]

Use a script to solve the problem. When .evn already has the same key value as .env.example, skip the update to avoid being overwritten.

ea3f54f (#4115)