Initial commit.

.dockerignore

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+Dockerfile
+.dockerignore
+.git*
+*.md

Dockerfile

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+FROM alpine:3.5
+
+# Permanent dependencies (runtime)
+#RUN \
+#	apk add --no-cache \
+#		libpng
+
+# Dev & build
+ARG GFLAGS_VERSION=v2.2.0
+ARG GUETZLI_VERSION=v1.0
+RUN \
+	apk add --no-cache --virtual .build-deps \
+		libpng-dev \
+		alpine-sdk \
+		git \
+		coreutils \
+		cmake \
+		&&\
+\
+	git clone "https://github.com/gflags/gflags.git" /var/tmp/gflags &&\
+	(cd /var/tmp/gflags &&\
+		git checkout "${GFLAGS_VERSION}" &&\
+		mkdir build &&\
+		cd build &&\
+		cmake .. &&\
+		make -j$(nproc) all install DESTDIR="/opt/build" \
+	) &&\
+\
+	git clone "https://github.com/google/guetzli.git" /var/tmp/guetzli &&\
+	(cd /var/tmp/guetzli &&\
+		git checkout "${GUETZLI_VERSION}" &&\
+		make -j$(nproc) config=release \
+			TARGETDIR=/usr/local/bin \
+			LDFLAGS="-L/opt/build/usr/local/lib -static" \
+			CXXFLAGS="-I/opt/build/usr/local/include" \
+			CFLAGS="-I/opt/build/usr/local/include" \
+			CPPFLAGS="-I/opt/build/usr/local/include" \
+	) &&\
+\
+	apk del --no-cache .build-deps &&\
+	rm -rf /var/tmp/* /tmp/* /opt/build
+
+ENTRYPOINT ["guetzli"]

README.md

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+# Guetzli Docker image
+
+This image includes a static build of Guetzli, the perceptual JPEG encoder made by Google. The entrypoint is configured to point directly at the binary
+so it is possible to use `docker run` on this image just as if you would use guetzli directly on your system.
+
+## Available tags
+
+All available tags are always listed [in Docker Hub](https://hub.docker.com/r/icedream/guetzli/tags), the list below explains the maintained tags:
+
+- `latest`, `1`, `1.0`: Latest stable version.
+
+## Examples
+
+Running the encoder on an image on the host system:
+
+    docker run --rm -it -v "$(pwd):/work" -w /work icedream/guetzli \
+        example.jpg example_compressed.jpg