From b310e9b3de781f3f3ed2878f8e35b0f1fbc92373 Mon Sep 17 00:00:00 2001
From: PJ Eby <pje@telecommunity.com>
Date: Wed, 15 Apr 2020 13:50:18 -0400
Subject: [PATCH] Support upstream version selection w/UPSTREAM arg

---
 Dockerfile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Dockerfile b/Dockerfile
index 07d4f98..1f42933 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,5 @@
-FROM analogic/poste.io:2.2.2
+ARG UPSTREAM=2.2.2
+FROM analogic/poste.io:$UPSTREAM
 RUN apt-get update && apt-get install less  # 'less' is Useful for debugging
 
 # Default to listening only on IPs bound to the container hostname