enabling dumb-init for shovel

Change-Id: I6bb546c21866f4b6d8f1095079f288945080396d
diff --git a/docker/Dockerfile.base b/docker/Dockerfile.base
index ee20521..8e5c09b 100644
--- a/docker/Dockerfile.base
+++ b/docker/Dockerfile.base
@@ -23,14 +23,16 @@
 
 # Update to have latest images
 RUN apt-get update && \
-    apt-get install -y python python-pip openssl iproute2 libpcap-dev
+    apt-get install -y python python-pip openssl iproute2 libpcap-dev wget
 
 COPY requirements.txt /tmp/requirements.txt
 
 # pip install cython enum34 six && \
 # Install app dependencies
-RUN apt-get install -y wget build-essential make gcc binutils python-dev libffi-dev libssl-dev git && \
+RUN wget https://github.com/Yelp/dumb-init/releases/download/v1.2.0/dumb-init_1.2.0_amd64.deb && \
+    dpkg -i *.deb && \
+    rm -f *.deb && \
+    apt-get install -y wget build-essential make gcc binutils python-dev libffi-dev libssl-dev git && \
     pip install -r /tmp/requirements.txt && \
     apt-get purge -y wget build-essential make gcc binutils python-dev libffi-dev libssl-dev git && \
     apt-get autoremove -y
-
diff --git a/docker/Dockerfile.ofagent b/docker/Dockerfile.ofagent
index b5d49f0..875113e 100644
--- a/docker/Dockerfile.ofagent
+++ b/docker/Dockerfile.ofagent
@@ -30,7 +30,6 @@
     wget http://ftp.us.debian.org/debian/pool/main/p/protobuf/libprotobuf-dev_3.0.0-9_amd64.deb && \
     wget http://ftp.us.debian.org/debian/pool/main/p/protobuf/libprotobuf10_3.0.0-9_amd64.deb && \
     wget http://ftp.us.debian.org/debian/pool/main/p/protobuf/protobuf-compiler_3.0.0-9_amd64.deb && \
-    wget https://github.com/Yelp/dumb-init/releases/download/v1.2.0/dumb-init_1.2.0_amd64.deb && \
     dpkg -i *.deb && \
     protoc --version && \
     rm -f *.deb
diff --git a/docker/Dockerfile.shovel b/docker/Dockerfile.shovel
index 4ae1808..7270e20 100644
--- a/docker/Dockerfile.shovel
+++ b/docker/Dockerfile.shovel
@@ -27,5 +27,7 @@
 COPY common /shovel/common
 COPY shovel /shovel/shovel
 
+ENTRYPOINT ["/usr/bin/dumb-init", "--"]
+
 # Exposing process and default entry point
 CMD ["python", "shovel/shovel/main.py"]