Older versions of ubuntu have a different path to bash

Author: Paul FREAKN Baker

docker-environment/Dockerfile.ubuntu

@@ -16,4 +16,4 @@ RUN usermod -aG sudo git-user
 RUN echo "%sudo ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers
 USER git-user
 WORKDIR /home/git-user
-ENTRYPOINT [ "/usr/bin/bash", "-c" ]
+ENTRYPOINT [ "/bin/bash", "-c" ]