Split and optimize gin logger

Signed-off-by: Asai Neko <sugar@sne.moe>

config/config.go

@@ -32,6 +32,6 @@ func Init() {
 		log.Fatalln("Can't read config!")
 	}
 	if err := viper.Unmarshal(conf); err != nil {
-		log.Fatal(err)
+		log.Fatalln(err)
 	}
 }