add env var for setting file (#147)

Co-authored-by: Xu, Guoxu | Terry | CNTD <guoxu.xu@rakuten.com>

src/utils/path.ts

@@ -16,8 +16,9 @@ const rootDir = dirname(dirname(__dirname));
  * @returns The path to the file
  */
 export const getConfigFilePath = (filename: string, description = 'Configuration'): string => {
-  // Try to find the correct path to the file
+  const envPath = process.env.MCPHUB_SETTING_PATH;
   const potentialPaths = [
+    ...(envPath ? [envPath] : []),
     // Prioritize process.cwd() as the first location to check
     path.resolve(process.cwd(), filename),
     // Use path relative to the root directory
@@ -25,13 +26,13 @@ export const getConfigFilePath = (filename: string, description = 'Configuration
     // If installed with npx, may need to look one level up
     path.join(dirname(rootDir), filename)
   ];
-  
+
   for (const filePath of potentialPaths) {
     if (fs.existsSync(filePath)) {
       return filePath;
     }
   }
-  
+
   // If all paths do not exist, use default path
   // Using the default path is acceptable because it ensures the application can proceed
   // even if the configuration file is missing. This fallback is particularly useful in