runit
3-stage init system. More information: <http://smarden.org/runit/runit.8.html>.
RUN apt-get update && \
apt-get install -y runit
RUN apt-get update && \
apt-get install -y runit
RUN apk add runit
RUN apt-get update && \
apt-get install -y runit
RUN apt-get update && \
apt-get install -y runit