• https://github.com/krallin/tini - Tini - A tiny but valid init for containers

Tini is the simplest init you could think of.

All Tini does is spawn a single child (Tini is meant to be run in a container), and wait for it to exit all the while reaping zombies and performing signal forwarding.

ENV TINI_VERSION v0.18.0
ADD https://github.com/krallin/tini/releases/download/${TINI_VERSION}/tini-static /tini-static
ADD https://github.com/krallin/tini/releases/download/${TINI_VERSION}/tini-static.asc /tini-static.asc
RUN gpg --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 595E85A6B1B4779EA4DAAEC70B588DFF0527A9B7 \
 && gpg --verify /tini-static.asc