DDD (Domain Design) partially implemented, added comments everywhere.

config/database.go

@@ -1,5 +1,6 @@
 package config
 
+// ConfigDatabase describes database configuration.
 type ConfigDatabase struct {
 	Address  string `yaml:"address"`
 	Port     string `yaml:"port"`

config/http.go

@@ -1,5 +1,6 @@
 package config
 
+// ConfigHTTP describes HTTP server configuration.
 type ConfigHTTP struct {
 	Address       string `yaml:"address"`
 	Port          string `yaml:"port"`

config/logging.go

@@ -1,5 +1,6 @@
 package config
 
+// ConfigLogging describes logger configuration.
 type ConfigLogging struct {
 	LogToFile bool   `yaml:"log_to_file"`
 	FileName  string `yaml:"filename"`

config/struct.go

@@ -1,5 +1,6 @@
 package config
 
+// ConfigStruct describes whole configuration.
 type ConfigStruct struct {
 	Database ConfigDatabase `yaml:"database"`
 	Logging  ConfigLogging  `yaml:"logging"`