Added multiple services to be trigered from main API

services/erp/erp_service.go

@@ -0,0 +1,11 @@
+package erp
+
+import (
+	"fmt"
+)
+
+func ERPService(ch chan string) {
+	for msg := range ch {
+		fmt.Println("ERP Service: ", msg)
+	}
+}