added git to dockerfile

Author: DvirDukhan

opt/build/docker/dockerfile.tmpl

@@ -30,8 +30,10 @@ COPY --from=redis /usr/local/ /usr/local/
 COPY ./opt/ opt/
 ADD ./tests/flow/ tests/flow/
 
-RUN FORCE=1 ./opt/readies/bin/getpy3
 RUN ./opt/readies/bin/getupdates
+RUN if [ ! -z $(command -v apt-get) ]; then apt-get -qq update; apt-get -q install -y git; fi
+RUN if [ ! -z $(command -v yum) ]; then yum install -y git; fi
+RUN FORCE=1 ./opt/readies/bin/getpy3
 RUN ./opt/system-setup.py
 
 ARG DEPS_ARGS=""