Cleaned up Dockerfile

Dockerfile

@@ -1,21 +1,16 @@
 FROM centos/python-36-centos7
-
-MAINTAINER RightBrain Networks "ops+docker@rightbrainnetworks.com"
-
+ 
 USER root
 
 #Perform updates
 RUN pip install --upgrade pip
 RUN yum update -y
 
-#Install reqs
-RUN yum install -y epel-release
-RUN yum install -y git
-
 #Setup semver
 ADD / /semver
 WORKDIR /semver
-RUN pip install -e .
+RUN python setup.py sdist
+RUN pip install dist/semver-*.tar.gz
 
 # Prep workspace
 RUN mkdir /workspace
@@ -26,6 +21,6 @@ VOLUME /workspace
 RUN useradd -d /semverUser semverUser
 RUN chown -R semverUser:semverUser /workspace
 
-CMD /opt/app-root/bin/semver
+ENTRYPOINT [ "semver" ]
 
 USER semverUser