Merge pull request #473 from JordanSussman/master

add Dockerfile based on alpine

Author: oakeyc

Dockerfile.alpine

@@ -0,0 +1,22 @@
+FROM alpine:latest
+
+RUN apk --update --no-cache add \
+    tar \
+    rsync \
+    ca-certificates \
+    openssh \
+    git \
+    bash \
+    gawk \
+    procps
+
+WORKDIR /backup-utils
+ADD https://github.com/github/backup-utils/archive/stable.tar.gz /
+RUN tar xzvf /stable.tar.gz --strip-components=1 -C /backup-utils && \
+    mv /usr/bin/gawk /usr/bin/awk && \
+    rm -r /stable.tar.gz
+
+RUN chmod +x /backup-utils/share/github-backup-utils/ghe-docker-init
+
+ENTRYPOINT ["/backup-utils/share/github-backup-utils/ghe-docker-init"]
+CMD ["ghe-host-check"]