chore(ci): add dockerfile as a base for building in CI

Author: ecordell

base.Dockerfile

@@ -1,12 +1,5 @@
-FROM golang:1.10 as builder
-WORKDIR /go/src/github.com/operator-framework/operator-lifecycle-manager
+# Dockerfile to bootstrap build and test in openshift-ci
 
-# SSH key to fetch operator-client dependency. should be base64 encoded
-# "--build-arg sshkey=`cat ~/.ssh/robot_rsa | base64 -w0`"
-ARG sshkey
-RUN mkdir -p ~/.ssh
-RUN apt-get install make git openssh-client gcc g++
+FROM openshift/origin-release:golang-1.13
 
-RUN echo $sshkey | base64 -d > ~/.ssh/id_rsa  \
-    && chmod 400 ~/.ssh/id_rsa \
-    && ssh-keyscan -t rsa github.com >> ~/.ssh/known_hosts
+RUN yum install -y skopeo