[gnome-commander] Updating to Ubuntu 18.04 in Dockerfile

[Uwe Scholz <uwescholz src gnome org>]

commit 2c2581a701e1263b8d70b9d4ae52e8fd97472a0f
Author: Uwe Scholz <u scholz83 gmx de>
Date:   Sun Jan 27 18:31:47 2019 +0100

    Updating to Ubuntu 18.04 in Dockerfile

 Dockerfile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/Dockerfile b/Dockerfile
index 12a50297..59e697ac 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # This is a Docker image for building gnome-commander
-FROM ubuntu:17.10
+FROM ubuntu:18.04
 MAINTAINER Uwe Scholz <u scholz83 gmx de>
 
 ENV GCMD_PATH /gnome-commander