chore: update config settings

Author: zerob13

.gitignore

@@ -19,3 +19,8 @@ Thumbs.db
 # Logs
 *.log
 samples/*.json
+
+# Configuration files (may contain sensitive API keys)
+config/providers.toml
+config/*.toml
+!config/*.toml.example

README.md

@@ -122,24 +122,37 @@ Options:
 ## 🔧 Configuration
 
 ### Provider Configuration (Optional)
-Create `config/providers.toml` file:
+
+**Step 1: Create your configuration file**
+```bash
+# Copy the example configuration file
+cp config/providers.toml.example config/providers.toml
+
+# Edit with your settings
+nano config/providers.toml  # or use your preferred editor
+```
+
+**Step 2: Configuration file format**
 ```toml
-[ppinfra]
+# config/providers.toml
+[providers.ppinfra]
 api_url = "https://api.ppinfra.com/openai/v1/models"
 rate_limit = 10
 timeout = 30
 
-[openrouter]
+[providers.openrouter]
 api_url = "https://openrouter.ai/api/v1/models"
-api_key_env = "OPENROUTER_API_KEY"
 rate_limit = 5
 
-[openai]
-api_url = "https://api.openai.com/v1/models" 
-api_key_env = "OPENAI_API_KEY"  # OpenAI requires API key
-rate_limit = 20
+[providers.gemini]
+api_url = "https://generativelanguage.googleapis.com/v1beta/openai/models"
+api_key_env = "GEMINI_API_KEY"  # or use api_key = "your-key"
+rate_limit = 10
+timeout = 60
 ```
 
+**🔒 Security Note**: The actual `config/providers.toml` file is ignored by git to prevent accidental API key commits. Always use the example file as a template.
+
 ### API Key Configuration
 
 The tool supports flexible API key configuration with multiple methods and clear priority ordering:
@@ -154,8 +167,13 @@ export GEMINI_API_KEY="your-key-here"
 ```
 
 **Method 2: Configuration File**
+```bash
+# First, copy the example configuration
+cp config/providers.toml.example config/providers.toml
+```
+
 ```toml
-# config/providers.toml
+# config/providers.toml (ignored by git for security)
 [providers.gemini]
 api_url = "https://generativelanguage.googleapis.com/v1beta/openai/models"
 # Option A: Use default environment variable

config/providers.toml config/providers.toml.exampleconfig/providers.toml renamed to config/providers.toml.example

@@ -1,4 +1,12 @@
-# PublicProviderConf Configuration File
+# PublicProviderConf Configuration File Example
+# 
+# SECURITY WARNING: This is an example file!
+# 1. Copy this file to 'providers.toml' in the same directory
+# 2. Edit 'providers.toml' with your actual settings and API keys
+# 3. The actual 'providers.toml' file is ignored by git to prevent API key leaks
+#
+# Usage: cp config/providers.toml.example config/providers.toml
+#
 # This file allows you to customize provider settings and API keys
 
 [providers.ppinfra]