feat: update nginx and docker-compose files to support HTTPS.

[Kennytian]

Description

Please include a summary of the changes and which issues are fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.

Fixes # (issue)

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update, included: Dify Document
• Improvement，including but not limited to code refactoring, performance optimization, and UI/UX improvement
• Dependency upgrade

How Has This Been Tested?

I have tested the code I submitted locally and everything works fine. Additionally, this change supports both HTTP and HTTPS requests. To enable HTTPS support, simply uncomment the code in the docker/nginx/conf.d/default.conf file and put the SSL certificate files in the docker/nginx/ssl/ directory.

Suggested Checklist:

• I have performed a self-review of my own code.
• I have commented on 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
• optional I have made corresponding changes to the documentation
• optional I have added tests that prove my fix is effective or that my feature works
• optional New and existing unit tests passed locally with my changes

[Kennytian]

@takatost Please review my PR :)

[crazywoola]

I'd recommend commenting on these lines, so that you can remove them when you need to, rather than having port 443 open by default in the first place

[Kennytian]

@crazywoola Thanks for your reply, I agree with you, and then will commenting on these lines right now.