Use TZ Dockerfile argument to set the time zone. For...

Use TZ Dockerfile argument to set the time zone.  For https://github.com/dtu-compute/dtu-enote/issues/62

Dockerfile

 FROM dtucompute/sharelatex-enote:v2
 
+LABEL github="https://github.com/dtu-compute/dtu-enote-getpdf"
+LABEL version="2018"
+LABEL description="This Dockerfile builds the container \
+for the get-pdf project."
+
+ARG TZ=Europe/Copenhagen
+
+# Set timezone
+RUN sudo cp /usr/share/zoneinfo/$TZ /etc/localtime
+RUN sudo bash -l -c 'echo "${TZ}" > /etc/timezone'
+
 RUN rm -rf /etc/service/* /etc/my_init.d/*
 RUN ln -s /bin/bash /usr/bin/bash