feat: update config & cors

src/mcp_template_python/config/__init__.py

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+from .app import settings
+
+__all__ = ["settings"]

src/mcp_template_python/config/app.py

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+from dotenv import load_dotenv
+from pydantic_settings import BaseSettings, SettingsConfigDict
+
+from mcp_template_python.config.cors import CORSSettings
+
+from .mcp import MCPSettings
+
+load_dotenv()
+
+
+class AppSettings(BaseSettings):
+    """
+    Configuration settings for the MCP template application.
+    """
+
+    model_config = SettingsConfigDict(
+        env_prefix="APP_",
+        extra="allow",
+    )
+
+    mcp: MCPSettings = MCPSettings()
+    """MCP settings, defaults to MCPSettings()."""
+
+    cors: CORSSettings = CORSSettings()
+    """CORS settings, defaults to CORSSettings()."""
+
+    title: str = "MCP Template Application"
+    """Title of the MCP application, defaults to 'MCP Template Application'."""
+
+    description: str = "A template application for MCP using FastAPI."
+    """Description of the MCP application, defaults to 'A template application for MCP using FastAPI.'"""
+
+    default_host: str = "127.0.0.1"
+    """Default host for the MCP server, defaults to 127.0.0.1."""
+
+    default_port: int = 3001
+    """Default port for the MCP server, defaults to 3001."""
+
+    log_level: str = "INFO"
+    """Logging level for the MCP server, defaults to 'info'."""
+
+    rich_console: bool = False
+    """Enable rich console output, defaults to False."""
+
+
+settings = AppSettings()

src/mcp_template_python/config/cors.py

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+from pydantic_settings import BaseSettings, SettingsConfigDict
+
+
+class CORSSettings(BaseSettings):
+    """
+    Configuration settings for CORS (Cross-Origin Resource Sharing).
+    """
+
+    model_config = SettingsConfigDict(
+        env_prefix="CORS_",
+        extra="allow",
+    )
+
+    allow_origins: str = "*"
+    """CORS allow origins, defaults to '*'."""
+
+    allow_credentials: bool = True
+    """CORS allow credentials, defaults to True."""
+
+    allow_methods: str = "*"
+    """CORS allow methods, defaults to '*'."""
+
+    allow_headers: str = "*"
+    """CORS allow headers, defaults to '*'."""

src/mcp_template_python/config/mcp.py

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+from pydantic_settings import BaseSettings, SettingsConfigDict
+
+
+class MCPSettings(BaseSettings):
+    """
+    Configuration settings for the MCP template application.
+    """
+
+    model_config = SettingsConfigDict(
+        env_prefix="MCP_",
+        extra="allow",
+    )
+
+    default_mcp: str = "math"
+    """Default MCP to be used by the application."""
+
+    instructions: str | None = None
+    """Instructions to be used by the MCP server, defaults to None."""
+
+    enable_helpers_router: bool = True
+    """Enable the helpers router for the MCP server."""
+
+    enable_sse: bool = True
+    """Enable Server-Sent Events (SSE) for the MCP server."""
+
+    enable_streamable_http: bool = True
+    """Enable streamable HTTP for the MCP server."""