Add docker configs for multi arch jenkins builds

dockerbuild/Dockerfile.centos6

@@ -0,0 +1,20 @@
+FROM centos:6
+
+ARG go_pkg_url
+
+RUN yum update -y
+RUN yum install -y curl git wget openssh-server sudo make rpmdevtools && yum clean all
+
+RUN curl -s $go_pkg_url -o go.tar.gz && \
+    tar -C /usr/local -xzf go.tar.gz && \
+   rm go.tar.gz
+
+RUN groupadd -g 1000 jenkins-build && useradd -u 1000 -g 1000 jenkins-build
+
+RUN echo $'\n\
+  export PATH=$PATH:/usr/local/go/bin:$HOME/go/bin\n'\
+  >> ~/.bash_profile
+
+RUN mkdir /rpmbuild && chmod 777 /rpmbuild
+
+CMD ["/usr/sbin/sshd", "-D"]