L2SS-462: Run apt-get update explicitly to make sure we are not requesting old...

L2SS-462: Run apt-get update explicitly to make sure we are not requesting old packages if our base image gets even slightly outdated.

docker-compose/jupyter/Dockerfile

@@ -25,6 +25,7 @@ RUN sudo pip3 install notebook-as-pdf
 
 # see https://github.com/jupyter/nbconvert/issues/1434
 RUN sudo bash -c "echo DEFAULT_ARGS += [\\\"--no-sandbox\\\"] >> /usr/local/lib/python3.7/dist-packages/pyppeteer/launcher.py"
+RUN sudo apt-get update -y
 RUN sudo apt-get install -y gconf-service libasound2 libatk1.0-0 libatk-bridge2.0-0 libc6 libcairo2 libcups2 libdbus-1-3 libexpat1 libfontconfig1 libgcc1 libgconf-2-4 libgdk-pixbuf2.0-0 libglib2.0-0 libgtk-3-0 libnspr4 libpango-1.0-0 libpangocairo-1.0-0 libstdc++6 libx11-6 libx11-xcb1 libxcb1 libxcomposite1 libxcursor1 libxdamage1 libxext6 libxfixes3 libxi6 libxrandr2 libxrender1 libxss1 libxtst6 ca-certificates fonts-liberation libappindicator1 libnss3 lsb-release xdg-utils wget libcairo-gobject2 libxinerama1 libgtk2.0-0 libpangoft2-1.0-0 libthai0 libpixman-1-0 libxcb-render0 libharfbuzz0b libdatrie1 libgraphite2-3 libgbm1
 
 # Allow Download as -> PDF via LaTeX