Add `docker` CLI to the `docker/compose` image

Signed-off-by: Joffrey F <[email protected]>

Dockerfile.run

@@ -29,6 +29,16 @@ RUN mkdir -p /lib /lib64 /usr/glibc-compat/lib/locale /etc && \
   	ln -s /usr/glibc-compat/lib/ld-linux-x86-64.so.2 /lib64/ld-linux-x86-64.so.2 && \
   	ln -s /usr/glibc-compat/etc/ld.so.cache /etc/ld.so.cache
 
+RUN apk add --no-cache curl && \
+    curl -fsSL -o dockerbins.tgz "https://download.docker.com/linux/static/stable/x86_64/docker-17.12.0-ce.tgz" && \
+    SHA256=692e1c72937f6214b1038def84463018d8e320c8eaf8530546c84c2f8f9c767d; \
+    echo "${SHA256}  dockerbins.tgz" | sha256sum -c - && \
+    tar xvf dockerbins.tgz docker/docker --strip-components 1 && \
+    mv docker /usr/local/bin/docker && \
+    chmod +x /usr/local/bin/docker && \
+    rm dockerbins.tgz && \
+    apk del curl
+
 COPY dist/docker-compose-Linux-x86_64 /usr/local/bin/docker-compose
 
 ENTRYPOINT ["docker-compose"]