fix(backend): fix localhost can not be visited by other pc

[sl-gn]

📝 Change Type

Please select the type of change this PR introduces (choose one or more):

• feat: New feature.
• [✅] fix: Bug fix.
• docs: Documentation only changes.
• refactor: A code change that neither fixes a bug nor adds a feature.
• perf: Performance improvement.
• test: Adding missing tests or correcting existing tests.
• chore: Maintenance tasks (e.g., updating dependencies).

💡 Description

fix localhost can not be visited by other pc

Key Changes

1. change localhost to 0.0.0.0 in backend