fix docker binary location

Author: fermayo

Dockerfile

@@ -5,10 +5,10 @@ RUN apt-get update && \
 	DEBIAN_FRONTEND=noninteractive apt-get install -yq iptables apt-transport-https ca-certificates ssh git curl make
 
 ENV DIND_COMMIT=b8bed8832b77a478360ae946a69dab5e922b194e DOCKER_VERSION=1.8.3 COMPOSE_VERSION=1.3.3
-ADD https://get.docker.com/builds/Linux/x86_64/docker-${DOCKER_VERSION} /usr/local/bin/docker
+ADD https://get.docker.com/builds/Linux/x86_64/docker-${DOCKER_VERSION} /usr/bin/docker
 ADD https://raw.githubusercontent.com/docker/docker/${DIND_COMMIT}/hack/dind /usr/local/bin/dind
 ADD https://github.com/docker/compose/releases/download/${COMPOSE_VERSION}/docker-compose-linux-x86_64 /usr/local/bin/docker-compose
-RUN chmod +x /usr/local/bin/docker /usr/local/bin/dind /usr/local/bin/docker-compose && rm -fr /var/lib/docker/*
+RUN chmod +x /usr/bin/docker /usr/local/bin/dind /usr/local/bin/docker-compose && rm -fr /var/lib/docker/*
 VOLUME /var/lib/docker
 
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