SAMPLE 018: API base URL with a path prefix produces malformed routes

[Young850]

• Add API_PREFIX environment variable support for reverse proxy deployments
• When API_PREFIX is set, all routes are nested under that prefix
• Example: API_PREFIX=/api/v1 makes /invoices available at /api/v1/invoices
• Properly handles path prefix with leading slash and trims trailing slash
• Maintains backward compatibility - no prefix when API_PREFIX is empty

Implementation:

• Split router into api_routes and conditionally nest under API_PREFIX
• Supports clean deployment scenarios where API is behind a reverse proxy with path rewrite

Closes #864

Pull Request

Summary

• Describe the purpose of this PR in one or two sentences.

Checklist

• PR description includes: Closes #[issue_id]
• Tests added or updated
• ABI snapshot updated if contract sources changed (abis/ and COMEBACKHERE-contracts/)
• Screenshots attached if UI changed
• Documentation updated if needed

Notes

• For contract changes, verify ABI snapshot hygiene with make check-abi-snapshots.
• For UI changes, include screenshots or screen recordings to help reviewers.

[drips-wave]

@Young850 Great news! 🎉 Based on an automated assessment of this PR, the linked Wave issue(s) no longer count against your application limits.

You can now already apply to more issues while waiting for a review of this PR. Keep up the great work! 🚀

Learn more about application limits