update the image build to use pip and latest python3

CLOUDBLD-7559

Signed-off-by: Harsh Modi <[email protected]>

Author: hjmodi

Dockerfile

@@ -1,6 +1,8 @@
 FROM fedora:latest
-RUN dnf -y install docker git python-docker-py python-setuptools desktop-file-utils e2fsprogs flatpak koji python-pip python-backports-lzma osbs gssproxy && dnf clean all
+RUN dnf -y install python3-setuptools flatpak python3-pip git \
+    gcc krb5-devel python3-devel popt-devel && dnf clean all
 RUN mkdir /tmp/atomic-reactor
 ADD . /tmp/atomic-reactor
-RUN cd /tmp/atomic-reactor && python setup.py install
+RUN pip3 install git+https://github.com/containerbuildsystem/osbs-client
+RUN cd /tmp/atomic-reactor && python3 setup.py install
 CMD ["atomic-reactor", "--verbose", "inside-build"]