Merge branch 'centos-support' into 'trunk'

Add centOS support

See merge request !1

Dockerfile

@@ -16,7 +16,7 @@ USER root
 ENV DEBIAN_FRONTEND=noninteractive
 
 # install basic software
-RUN apt update &&  apt install git build-essential -y
+RUN (apt update &&  apt install git build-essential -y ) || yum groupinstall 'Development Tools' -y
 
 # checkout and build the cpython suite.
 RUN 	mkdir /work  							&& \