init: first commit

Signed-off-by: Jérémie Drouet <jeremie.drouet@gmail.com>

Dockerfile

+FROM alpine AS fetcher
+
+RUN apk add curl
+
+ARG BUILDX_VERSION=0.3.1
+RUN curl -L \
+  --output /docker-buildx \
+  "https://github.com/docker/buildx/releases/download/v${BUILDX_VERSION}/buildx-v${BUILDX_VERSION}.linux-amd64"
+
+RUN chmod a+x /docker-buildx
+
+FROM docker:stable
+
+COPY --from=fetcher /docker-buildx /usr/lib/docker/cli-plugins/docker-buildx
+

readme.md

+# docker image with buildx installed
+
+To build the image, you just have to run
+
+```bash
+docker build -t docker-with-buildx .
+```