fixed cubit lic issue

Dockerfile

@@ -40,6 +40,7 @@ ENV LANG=C.UTF-8 LC_ALL=C.UTF-8 \
     CC=/usr/bin/mpicc CXX=/usr/bin/mpicxx \
     DEBIAN_FRONTEND=noninteractive
 
+RUN apt-get --allow-releaseinfo-change update
 RUN apt-get update -y && \
     apt-get upgrade -y
 
@@ -55,6 +56,36 @@ RUN echo installing CadQuery version $cq_version && \
     pip install jupyter-cadquery==2.2.0 && \
     conda clean -afy
 
+# Download Cubit
+RUN wget -O coreform-cubit-2021.5.deb https://f002.backblazeb2.com/file/cubit-downloads/Coreform-Cubit/Releases/Linux/Coreform-Cubit-2021.5%2B15962_5043ef39-Lin64.deb
+
+# install Cubit dependencies
+RUN apt-get install -y libx11-6
+RUN apt-get install -y libxt6
+RUN apt-get install -y libgl1
+RUN apt-get install -y libglu1-mesa
+RUN apt-get install -y libgl1-mesa-glx
+RUN apt-get install -y libxcb-icccm4
+RUN apt-get install -y libxcb-image0
+RUN apt-get install -y libxcb-keysyms1
+RUN apt-get install -y libxcb-render-util0
+RUN apt-get install -y libxkbcommon-x11-0
+RUN apt-get install -y libxcb-randr0
+RUN apt-get install -y libxcb-xinerama0
+
+# Install cubit
+RUN dpkg -i coreform-cubit-2021.5.deb
+
+# installs svalinn plugin for cubit
+RUN wget https://github.com/svalinn/Cubit-plugin/releases/download/0.2.1/svalinn-plugin_debian-10.10_cubit_2021.5.tgz
+RUN tar -xzvf svalinn-plugin_debian-10.10_cubit_2021.5.tgz -C /opt/Coreform-Cubit-2021.5
+
+# writes a non commercial license file
+RUN mkdir -p /root/.config/Coreform/licenses
+RUN printf 'Fri May 28 2021' >> /root/.config/Coreform/licenses/cubit-learn.lic
+
+# helps to identify Cubit related errrors
+ENV CUBIT_VERBOSE=5
 
 # dagmc is needed as it includes the make_watertight command and moab
 # conda install -c conda-forge -c moab # now included with dagmc