[releng/oscp] Convert to py3

[Andrea Veri <averi src gnome org>]

commit eeb6be0b80bb99df4250e8a4f7072806980a2233
Author: Andrea Veri <averi redhat com>
Date:   Thu Apr 2 19:06:00 2020 +0200

    Convert to py3

 Dockerfile | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/Dockerfile b/Dockerfile
index 6be23cb..98be7d1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
-FROM centos:7
+FROM centos:8
 
-RUN yum install -y epel-release git && \
-    yum -y clean all --enablerepo='*'
+RUN dnf install -y git python3 && \
+    dnf -y clean all --enablerepo='*'
 
 RUN git clone https://gitlab.gnome.org/GNOME/releng.git /opt/releng
 
@@ -10,4 +10,4 @@ RUN groupadd releng -g 1000450000 && \
 
 RUN chown -R releng:releng /opt/releng
 
-ENTRYPOINT ["/usr/bin/python2"]
+ENTRYPOINT ["/usr/bin/python3"]