Dockerfile: use dumb-init

Author: gregwebs

Dockerfile

@@ -19,6 +19,11 @@ RUN curl -sL "https://releases.hashicorp.com/packer/0.10.1/packer_0.10.1_linux_a
   && unzip packer.zip \
   && mv packer /usr/local/bin
 
+RUN curl -sL -o /usr/local/bin/dumb-init https://github.com/Yelp/dumb-init/releases/download/v1.1.3/dumb-init_1.1.3_amd64 && chmod +x /usr/local/bin/dumb-init
+
+ENTRYPOINT ["/usr/local/bin/dumb-init"]
+
 ADD . /src
 
 RUN cd /src && make install
+