type AppConfig struct {
Environment string `mapstructure:"environment"`
Port int `mapstructure:"port"`
Log Log `mapstructure:"log"`
Db Db `mapstructure:"db"`
}
type Db struct {
Host string `mapstructure:"host"`
Port int `mapstructure:"port"`
Username string `mapstructure:"username"`
Password string `mapstructure:"password"`
Database string `mapstructure:"database"`
}