do not use config attribute for the list of services

config/config.go

@@ -56,7 +56,6 @@ type Config struct {
 	Service struct {
 		Foo ServiceConfig
 	}
-	Services []ServiceConfig
 
 	Docker struct {
 		Socket string
@@ -86,9 +85,6 @@ func New() (*Config, error) {
 	c.Docker.Core.Path = "/mesg"
 	c.Docker.Socket = "/var/run/docker.sock"
 	c.Service.Foo = ServiceConfig{"https://github.com/mesg-foundation/service-ethereum-erc20", map[string]string{}}
-	c.Services = []ServiceConfig{
-		c.Service.Foo,
-	}
 	return &c, nil
 }
 
@@ -138,6 +134,13 @@ func (c *Config) Validate() error {
 	return nil
 }
 
+// Services returns all services that the configuration package is aware of
+func (c *Config) Services() []ServiceConfig {
+	return []ServiceConfig{
+		c.Service.Foo,
+	}
+}
+
 // DaemonEnv returns the needed environmental variable for the Daemon.
 func (c *Config) DaemonEnv() map[string]string {
 	return map[string]string{

core/main.go

@@ -42,7 +42,7 @@ func initGRPCServer(c *config.Config) (*grpc.Server, error) {
 }
 
 func deployCoreServices(c *config.Config, api *api.API) error {
-	for _, service := range c.Services {
+	for _, service := range c.Services() {
 		logrus.Infof("Deploy service from %s", service.URL)
 		s, valid, err := api.DeployServiceFromURL(service.URL, service.Env)
 		if valid != nil {