add Dockerfile based on alpine

docker/alpine/Dockerfile

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+#
+# Dockerfile for shadowsocks-libev
+#
+
+FROM alpine
+MAINTAINER kev <noreply@datageek.info>
+
+ENV SS_VER 2.4.4
+ENV SS_URL https://github.com/shadowsocks/shadowsocks-libev/archive/v$SS_VER.tar.gz
+ENV SS_DIR shadowsocks-libev-$SS_VER
+ENV SS_DEP autoconf build-base curl libtool linux-headers openssl-dev
+
+RUN set -ex \
+    && apk add --update $SS_DEP \
+    && curl -sSL $SS_URL | tar xz \
+    && cd $SS_DIR \
+        && ./configure \
+        && make install \
+        && cd .. \
+        && rm -rf $SS_DIR \
+    && apk del --purge $SS_DEP \
+    && rm -rf /var/cache/apk/*
+
+ENV SERVER_ADDR 0.0.0.0
+ENV SERVER_PORT 8388
+ENV PASSWORD=
+ENV METHOD      aes-256-cfb
+ENV TIMEOUT     300
+ENV DNS_ADDR    8.8.8.8
+
+EXPOSE $SERVER_PORT
+
+CMD ss-server -s $SERVER_ADDR \
+              -p $SERVER_PORT \
+              -k ${PASSWORD:-$(hostname)} \
+              -m $METHOD \
+              -t $TIMEOUT \
+              --fast-open \
+              -d $DNS_ADDR \
+              -u

docker/alpine/README.md

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+shadowsocks-libev
+=================
+
+[shadowsocks-libev][1] is a lightweight secured socks5 proxy for embedded
+devices and low end boxes.  It is a port of [shadowsocks][2] created by
+@clowwindy maintained by @madeye and @linusyang.
+
+Suppose we have a VPS running Debian or Ubuntu.
+To deploy the service quickly, we can use [docker][3].
+
+## Install docker
+
+```
+$ curl -sSL https://get.docker.com/ | sh
+$ docker --version
+```
+
+## Build docker image
+
+```bash
+$ curl -sSL https://github.com/shadowsocks/shadowsocks-libev/blob/master/docker/alpine/Dockerfile | docker build -t shadowsocks-libev .
+$ docker images
+```
+
+> You can also use a pre-built docker image: [vimagick/shadowsocks-libev][4] ![][5].
+
+## Run docker container
+
+```bash
+$ docker run -d -e METHOD=aes-256-cfb -e PASSWORD=9MLSpPmNt -p 8388:8388 --restart always shadowsocks-libev
+$ docker ps
+```
+
+> :warning: Click [here][6] to generate a strong password to protect your server.
+
+## Use docker-compose to manage (optional)
+
+It is very handy to use [docker-compose][7] to manage docker containers.
+You can download the binary at <https://github.com/docker/compose/releases>.
+
+This is a sample `docker-compose.yml` file.
+
+```yaml
+shadowsocks:
+  image: shadowsocks-libev
+  ports:
+    - "8388:8388"
+  environment:
+    - METHOD=aes-256-cfb
+    - PASSWORD=9MLSpPmNt
+  restart: always
+```
+
+It is highly recommended that you setup a directory tree to make things easy to manage.
+
+```bash
+$ mkdir -p ~/fig/shadowsocks/
+$ cd ~/fig/shadowsocks/
+$ curl -sSLO https://github.com/shadowsocks/shadowsocks-libev/blob/master/docker/alpine/docker-compose.yml
+$ docker-compose up -d
+$ docker-compose ps
+```
+
+## Finish
+
+At last, download shadowsocks client [here][8].
+Don't forget to share internet with your friends.
+
+```yaml
+{
+    "server": "your-vps-ip",
+    "server_port": 8388,
+    "local_address": "0.0.0.0",
+    "local_port": 1080,
+    "password": "9MLSpPmNt",
+    "timeout": 600,
+    "method": "aes-256-cfb"
+}
+```
+
+[1]: https://github.com/shadowsocks/shadowsocks-libev
+[2]: https://shadowsocks.org/en/index.html
+[3]: https://github.com/docker/docker
+[4]: https://hub.docker.com/r/vimagick/shadowsocks-libev/
+[5]: https://badge.imagelayers.io/vimagick/shadowsocks-libev:latest.svg
+[6]: https://duckduckgo.com/?q=password+12&t=ffsb&ia=answer
+[7]: https://github.com/docker/compose
+[8]: https://shadowsocks.org/en/download/clients.html

docker/alpine/docker-compose.yml

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+shadowsocks:
+  image: shadowsocks-libev
+  ports:
+    - "8388:8388"
+  environment:
+    - METHOD=aes-256-cfb
+    - PASSWORD=9MLSpPmNt
+  restart: always