Minor typo in docker / docs / source / work_flows.rst

[Tale Bakken Ulfsby]

In the section "Create a custom image for my project" there is a typo in the Dockerfile script. The line

apt-get -y install python-scipy \

should be

apt-get -y install python-scipy && \

[Jack Hale]

Fix typo closes issue #47 [skip build].

→ <<cset 133f8828ce2f>>

[Jack Hale]

Thanks!