feat(docker): Support alpine docker image. (#314)

.drone.yml

@@ -83,6 +83,19 @@ pipeline:
       event: [ push, tag ]
       local: false
 
+  publish_linux_alpine:
+    image: plugins/docker
+    group: release
+    pull: true
+    dockerfile: Dockerfile.alpine
+    secrets: [ docker_username, docker_password ]
+    default_tags: true
+    default_suffix: alpine
+    repo: ${DRONE_REPO}
+    when:
+      event: [ push, tag ]
+      local: false
+
   publish_linux_arm:
     image: plugins/docker
     group: release

Dockerfile.alpine

@@ -0,0 +1,16 @@
+FROM alpine:3.6
+
+LABEL org.label-schema.version=latest
+LABEL org.label-schema.vcs-url="https://github.com/appleboy/gorush.git"
+LABEL org.label-schema.name="Gorush"
+LABEL org.label-schema.vendor="Bo-Yi Wu"
+LABEL org.label-schema.schema-version="1.0"
+LABEL maintainer="Bo-Yi Wu <appleboy.tw@gmail.com>"
+
+RUN apk add -U --no-cache ca-certificates && \
+  rm -rf /var/cache/apk/*
+
+ADD bin/gorush /
+
+EXPOSE 8088 9000
+ENTRYPOINT ["/gorush"]