This is sad, phantomjs is better stripped than Chromium headless, if you ever try to install Chromium on servers without X, it requires shit ton of dependencies, while phantomjs was properly modified requires only minimal library.
chromium-browser chromium-browser-l10n chromium-codecs-ffmpeg-extra cpp
cpp-4.8 fontconfig fontconfig-config fonts-dejavu-core hicolor-icon-theme
libasound2 libasound2-data libatk1.0-0 libatk1.0-data libatomic1
libavahi-client3 libavahi-common-data libavahi-common3 libcairo2
libcloog-isl4 libcups2 libdatrie1 libdrm-intel1 libdrm-nouveau2
libdrm-radeon1 libfile-basedir-perl libfile-desktopentry-perl
libfile-mimeinfo-perl libfontconfig1 libfontenc1 libgdk-pixbuf2.0-0
libgdk-pixbuf2.0-common libgl1-mesa-dri libgl1-mesa-glx libglapi-mesa
libgmp10 libgnome-keyring-common libgnome-keyring0 libgraphite2-3
libgtk2.0-0 libgtk2.0-bin libgtk2.0-common libharfbuzz0b libice6 libisl10
libjasper1 libjbig0 libjpeg-turbo8 libjpeg8 libllvm3.4 libmpc3 libmpfr4
libnspr4 libnss3 libnss3-nssdb libpango-1.0-0 libpangocairo-1.0-0
libpangoft2-1.0-0 libpciaccess0 libpixman-1-0 libsm6 libspeechd2
libthai-data libthai0 libtiff5 libtxc-dxtn-s2tc0 libx11-xcb1 libxaw7
libxcb-dri2-0 libxcb-dri3-0 libxcb-glx0 libxcb-present0 libxcb-render0
libxcb-shape0 libxcb-shm0 libxcb-sync1 libxcomposite1 libxcursor1
libxdamage1 libxfixes3 libxft2 libxi6 libxinerama1 libxmu6 libxpm4
libxrandr2 libxrender1 libxshmfence1 libxss1 libxt6 libxtst6 libxv1
libxxf86dga1 libxxf86vm1 x11-common x11-utils x11-xserver-utils xdg-utils
fontconfig-config fonts-dejavu-core libfontconfig1 libjpeg-turbo8 libjpeg8 $ docker run -it ubuntu:16.04 sh -c 'apt-get update && apt-get install phantomjs'
134 newly installed. After this operation, 339 MB of additional disk space will be used.
$ docker run -it ubuntu:16.04 sh -c 'apt-get update && apt-get install chromium-browser'
202 newly installed. After this operation, 615 MB of additional disk space will be used.