From 5c0d96cbf46461a3646115ed7ff9ed4d364ef21c Mon Sep 17 00:00:00 2001
From: Yash Thakkar <thakkaryash94@gmail.com>
Date: Sun, 20 Oct 2019 12:08:13 +0530
Subject: [PATCH] Add ARG syntax in dockerfile.md

Add ARG syntax in dockerfile. https://docs.docker.com/engine/reference/builder/#arg
---
 dockerfile.md | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/dockerfile.md b/dockerfile.md
index 82b5d9f78..660259a1c 100644
--- a/dockerfile.md
+++ b/dockerfile.md
@@ -22,6 +22,11 @@ ENV APP_HOME /myapp
 RUN mkdir $APP_HOME
 ```
 
+```docker
+ARG APP_HOME=""
+RUN mkdir $APP_HOME
+```
+
 ### Initialization
 
 ```docker