add zstd

zstd/contrib/docker/Dockerfile

@@ -0,0 +1,20 @@
+# Dockerfile
+# First image to build the binary
+FROM alpine@sha256:69665d02cb32192e52e07644d76bc6f25abeb5410edc1c7a81a10ba3f0efb90a as builder
+
+RUN apk --no-cache add make gcc libc-dev
+COPY . /src
+RUN mkdir /pkg && cd /src && make && make DESTDIR=/pkg install
+
+# Second minimal image to only keep the built binary
+FROM alpine@sha256:69665d02cb32192e52e07644d76bc6f25abeb5410edc1c7a81a10ba3f0efb90a
+
+# Copy the built files
+COPY --from=builder /pkg /
+
+# Copy the license as well
+RUN mkdir -p /usr/local/share/licenses/zstd
+COPY --from=builder /src/LICENSE /usr/local/share/licences/zstd/
+
+# Just run `zstd` if no other command is given
+CMD ["/usr/local/bin/zstd"]

zstd/contrib/docker/README.md

@@ -0,0 +1,20 @@
+
+## Requirement
+
+The `Dockerfile` script requires a version of `docker` >= 17.05
+
+## Installing docker
+
+The official docker install docs use a ppa with a modern version available:
+https://docs.docker.com/install/linux/docker-ce/ubuntu/
+
+## How to run
+
+`docker build -t zstd .`
+
+## test
+
+```
+echo foo | docker run -i --rm zstd | docker run -i --rm zstd zstdcat
+foo
+```