added SearXNG entry

[jaainil]

What is this PR about?

New PR of SearXNG Template

Summary of Changes

✅ Template Creation

• Created complete SearXNG template in blueprints/searxng/ with:
  • docker-compose.yml - Clean setup with Redis dependency and proper volume mounts
  • template.toml - Configuration with environment variables and settings.yml content
  • searxng.png - Logo downloaded from GitHub avatar

✅ Meta.json Standardization

• Reformatted all tag lists for consistency across all entries (converted from multi-line arrays to single-line format)
• Added new SearXNG entry with proper metadata:
  • ID: searxng
  • Name: SearXNG
  • Version: latest
  • Description: Privacy-respecting metasearch engine
  • Logo: searxng.png
  • Links: GitHub, website, and documentation
  • Tags: ["search-engine", "metasearch", "privacy", "self-hosted", "aggregator"]

✅ Template Configuration

• Docker Compose: Updated to version 3.8 with proper volume definitions
• Environment Variables: Configured SEARXNG_BASE_URL for proper domain handling
• Settings File: Added settings.yml content with secret key generation and privacy-focused defaults
• Volume Management: Proper persistent storage for Redis data and SearXNG configuration/cache

Checklist

• I have read the suggestions in the README.md file https://github.com/Dokploy/templates?tab=readme-ov-file#general-suggestions-when-creating-a-template
• I have tested the template in my instance, so the maintainers don't spend time trying to figure out what's wrong
• I have added tests that demonstrate that my correction works or that my new feature works

Technical Details

The template includes:

• Redis dependency for caching and session management
• Privacy-focused defaults (limiter disabled, image proxy disabled)
• Secure secret key generation (64-character password)
• Proper volume persistence for configuration and cache data
• Clean Docker setup without unnecessary container names or network definitions

The SearXNG template is now ready for deployment and follows all Dokploy best practices for template creation.

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