Updated the config.h

src/api/config.h

@@ -9,9 +9,10 @@ class config {
 public:
     /**
      * Reads the config file and returns a json object.
+     * @param path  path to the config file
      * @return  json object
      */
-    static json read_config();
+    static json read_config(const std::string& path);
 
     /**
      * Checks if the config file is valid.