#24 Add git flow

Dockerfile

@@ -21,5 +21,11 @@ RUN echo "Install dorgflow" && \
     composer install --no-dev && \
     ln -s /var/opt/dorgflow/dorgflow /usr/local/bin/dorgflow && \
     \
+    echo "Install git-flow" && \
+    wget --no-check-certificate -q  https://raw.githubusercontent.com/petervanderdoes/gitflow-avh/develop/contrib/gitflow-installer.sh && \
+    chmod +x gitflow-installer.sh && \
+    ./gitflow-installer.sh install stable && \
+    rm gitflow-installer.sh && \
+    \
     rm -rf /var/cache/* && \
     rm -rf /root/.composer/cache