Updated atom to 1.12.3
diff --git a/atom/Dockerfile b/atom/Dockerfile
index cf72e6c..e3e1e9c 100644
--- a/atom/Dockerfile
+++ b/atom/Dockerfile
@@ -40,7 +40,7 @@
 	--no-install-recommends \
 	&& rm -rf /var/lib/apt/lists/*
 
-ENV ATOM_VERSION 1.11.0
+ENV ATOM_VERSION 1.12.3
 
 # download the source
 RUN buildDeps=' \