Update versions in Dockerfiles

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

Dockerfile

@@ -1,3 +1,4 @@
+FROM docker:18.06.1 as docker
 FROM python:3.6
 
 RUN set -ex; \
@@ -8,13 +9,7 @@ RUN set -ex; \
         python-dev \
         git
 
-RUN 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
+COPY --from=docker /usr/local/bin/docker /usr/local/bin/docker
 
 # Python3 requires a valid locale
 RUN echo "en_US.UTF-8 UTF-8" > /etc/locale.gen && locale-gen

Dockerfile.run

@@ -1,7 +1,7 @@
-FROM docker:17.12.1 as docker
-FROM alpine:3.6
+FROM docker:18.06.1 as docker
+FROM alpine:3.8
 
-ENV GLIBC 2.27-r0
+ENV GLIBC 2.28-r0
 
 RUN apk update && apk add --no-cache openssl ca-certificates curl libgcc && \
     curl -fsSL -o /etc/apk/keys/sgerrand.rsa.pub https://alpine-pkgs.sgerrand.com/sgerrand.rsa.pub && \