nginx-proxy: use yaml config instead of hardcoded rules

[friofry]

Key Changes

Yaml rules configuration instead of hardcoded lua dictionaries

Configuration Management

• nginx-proxy/cache_rules.yaml - cache rules configuration
  • Network-specific TTL strategies (ethereum:mainnet, arbitrum:mainnet, etc.)
  • Method classifications (permanent, short, minimal)
  • Hierarchical configuration resolution: chain:network → chain → default
  • Fractional ttl

Code Structure Refactoring

lua/
├── auth/           # Authentication modules  
├── cache/          # Caching system modules
├── providers/      # Provider management
├── utils/          # Utility functions
└── lua_tests/      # Tests powered by Busted framework

New Modules:

• cache_rules.lua - Configuration engine with YAML integration
• cache_rules_reader.lua - YAML parser with validation
• Test suite with mock utilities

Docker & Configuration Changes

• config.json → auth_config.json
• All configs moved to /app/ directory
• Env vars:
  • CACHE_RULES_FILE → /app/cache_rules.yaml
  • AUTH_CONFIG_FILE → /app/auth_config.json

closes #55

[Copilot]

Pull Request Overview

This PR refactors the nginx-proxy caching system to use YAML-based configuration instead of hardcoded rules. The change enables dynamic cache rule management through external configuration files while maintaining backward compatibility.

• Introduces YAML-based cache configuration system with cache_rules.yaml
• Restructures Lua modules into organized subdirectories (auth/, cache/, utils/)
• Adds comprehensive test suite with mock utilities for cache and nginx functionality

Reviewed Changes

Copilot reviewed 24 out of 26 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
nginx-proxy/nginx.conf	Adds CACHE_RULES_FILE environment variable and updates module paths
nginx-proxy/cache_rules.yaml	New YAML configuration defining cache rules and TTL defaults
nginx-proxy/lua/cache/*.lua	New cache modules implementing YAML-based caching logic
nginx-proxy/lua_tests/*	Comprehensive test suite with mocking utilities
docker-compose*.yml	Updates volume mounts and config file paths
Dockerfiles	Installs YAML dependencies and updates file paths

Comments suppressed due to low confidence (1)

nginx-proxy/lua_tests/test_utils/nginx_mocks.lua:19

• [nitpick] The mock MD5 function returns a predictable hash based on string length, which may not adequately test hash collision scenarios. Consider using a more realistic mock that generates unique hashes.

            return "mock_hash_" .. string.len(str)

[markoburcul]

Just a few questions, but LGTM!