add new Dockerfile.docker-ce for docker-ce(>=v17.06) to build docker image

Dockerfile.docker-ce

@@ -0,0 +1,42 @@
+FROM golang:1.10.3-alpine AS binarybuilder
+# Install build deps
+RUN apk --no-cache --no-progress add --virtual build-deps build-base git linux-pam-dev
+WORKDIR /go/src/github.com/gogs/gogs
+COPY . .
+RUN make build TAGS="sqlite cert pam"
+
+FROM alpine:3.7
+# Install system utils & Gogs runtime dependencies
+ADD https://github.com/tianon/gosu/releases/download/1.10/gosu-amd64 /usr/sbin/gosu
+RUN chmod +x /usr/sbin/gosu \
+  && echo http://dl-2.alpinelinux.org/alpine/edge/community/ >> /etc/apk/repositories \
+  && apk --no-cache --no-progress add \
+    bash \
+    ca-certificates \
+    curl \
+    git \
+    linux-pam \
+    openssh \
+    s6 \
+    shadow \
+    socat \
+    tzdata
+
+ENV GOGS_CUSTOM /data/gogs
+
+# Configure LibC Name Service
+COPY docker/nsswitch.conf /etc/nsswitch.conf
+
+WORKDIR /app/gogs
+COPY docker ./docker
+COPY templates ./templates
+COPY public ./public
+COPY --from=binarybuilder /go/src/github.com/gogs/gogs/gogs .
+
+RUN ./docker/finalize-docker-ce.sh
+
+# Configure Docker Container
+VOLUME ["/data"]
+EXPOSE 22 3000
+ENTRYPOINT ["/app/gogs/docker/start.sh"]
+CMD ["/bin/s6-svscan", "/app/gogs/docker/s6/"]

docker/finalize-docker-ce.sh

@@ -0,0 +1,19 @@
+#!/bin/sh
+# Finalize the build
+
+set -x
+set -e
+
+# Create git user for Gogs
+addgroup -S git
+adduser -G git -H -D -g 'Gogs Git User' git -h /data/git -s /bin/bash && usermod -p '*' git && passwd -u git
+echo "export GOGS_CUSTOM=${GOGS_CUSTOM}" >> /etc/profile
+
+# Final cleaning
+rm /app/gogs/docker/build.sh
+rm /app/gogs/docker/build-go.sh
+rm /app/gogs/docker/finalize.sh
+rm /app/gogs/docker/finalize-docker-ce.sh
+rm /app/gogs/docker/nsswitch.conf
+rm /app/gogs/docker/README.md
+

docker/finalize.sh

@@ -12,6 +12,7 @@ rm -rf /app/gogs/build
 rm /app/gogs/docker/build.sh
 rm /app/gogs/docker/build-go.sh
 rm /app/gogs/docker/finalize.sh
+rm /app/gogs/docker/finalize-docker-ce.sh
 rm /app/gogs/docker/nsswitch.conf
 rm /app/gogs/docker/README.md