add new enviroment variables and remove cli flags

backend/models/stringSlice.go

@@ -4,11 +4,10 @@ import "strings"
 
 type StringSlice []string
 
-func (s *StringSlice) String() string {
-	return strings.Join(*s, ",")
-}
-
-func (s *StringSlice) Set(value string) error {
+func (s *StringSlice) Set(value string) {
+	if strings.Contains(value, ",") {
+		*s = append(*s, strings.Split(value, ",")...)
+		return
+	}
 	*s = append(*s, value)
-	return nil
 }