Impl storage mongo driver and config

config/config.go

@@ -0,0 +1,24 @@
+package config
+
+import "local/args"
+
+type Config struct {
+	Port  int
+	DBURI string
+}
+
+func New() Config {
+	as := args.NewArgSet()
+
+	as.Append(args.INT, "p", "port to listen on", 18114)
+	as.Append(args.STRING, "dburi", "database uri", "mongodb://localhost:27017")
+
+	if err := as.Parse(); err != nil {
+		panic(err)
+	}
+
+	return Config{
+		Port:  as.GetInt("p"),
+		DBURI: as.GetString("dburi"),
+	}
+}