feat: initialized smtp service;

refactor: config now returns a copy of a struct to prevent editing;
chore: corrected identation

backend/config/config.go

@@ -153,16 +153,16 @@ func Load() (*Config, error) {
 	return &cfg, nil
 }
 
-func GetConfig() *Config {
+func GetConfig() Config {
 
 	if config == nil {
-		
+
 		if _, err := Load(); err != nil {
 			panic(err)
 		}
 	}
 
-	return config
+	return *config
 }
 
 var config *Config