Merge pull request #108 from LeslieLeung/feature/mcp-server

fix: update MCP server host configuration

fix: update nginx configuration for backend proxy settings

- Changed the Host header to point to the backend service at port 8000.
- Added X-Forwarded-Host header to preserve the original host information in proxied requests.

feat: add MCP server proxy configuration and update URL notes in sett…

…ings

- Introduced a new location block in nginx configuration to proxy requests to the MCP server.
- Updated the URL note in English and Chinese settings to clarify usage with Docker deployment and self-hosted configurations.

chore: bump version to 0.2.5-alpha.1

Merge pull request #103 from LeslieLeung/chore/bump-version

chore: bump version to 0.2.4-alpha.1

Merge pull request #83 from LeslieLeung/feature/fetch-fulltext

Merge pull request #79 from LeslieLeung/hotfix/embedding

Merge pull request #75 from LeslieLeung/hotfix/embedding