Package 'chromium-browser' has no installation candidate

If you happen to be running a Debian-based image, the package you want is chromium (vs chromium-browser). So, for such images, this'll take care of it for you:

RUN apt-get install chromium -y

I solved it as follows:

# install manually all the missing libraries
RUN apt-get install -y gconf-service libasound2 libatk1.0-0 libcairo2 libcups2 libfontconfig1 libgdk-pixbuf2.0-0 libgtk-3-0 libnspr4 libpango-1.0-0 libxss1 fonts-liberation libappindicator1 libnss3 lsb-release xdg-utils

# install chrome
RUN wget
RUN dpkg -i google-chrome-stable_current_amd64.deb; apt-get -fy install