From bb1e4d37a4c5818c2ecc4d8b6b565652483f37fb Mon Sep 17 00:00:00 2001
From: Ray Ozzie <ray@ozzie.net>
Date: Fri, 25 Mar 2016 14:13:02 -0400
Subject: [PATCH] dockerfile

---
 Dockerfile | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Dockerfile b/Dockerfile
index 2b7a638..5d916e3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,8 +1,13 @@
 FROM resin/raspberrypi-buildpack-deps
 
-# Enable systemd
+# Enable systemd, as Resin requires this
 ENV INITSYSTEM on
 
+# Version number of gateway software
+# (Incrementing this simply forces Docker to flush its cache
+#  and thus forces a full rebuild.)
+ENV TTN_GATEWAY_SOFTWARE 45
+
 # Build the gateway
 COPY build.sh /tmp/build.sh
 WORKDIR /tmp