Added V2Ray Docker Image

docker/v2ray/README.md

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+## V2Ray Docker Image by Teddysun
+
+[V2Ray][1] is a platform for building proxies to bypass network restrictions.
+
+It secures your network connections and thus protects your privacy.
+
+Docker images are built for quick deployment in various computing cloud providers.
+
+For more information on docker and containerization technologies, refer to [official document][2].
+
+## Prepare the host
+
+If you need to install docker by yourself, follow the [official installation guide][3].
+
+## Pull the image
+
+```bash
+$ docker pull teddysun/v2ray
+```
+
+This pulls the latest release of V2Ray.
+
+It can be found at [Docker Hub][4].
+
+## Start a container
+
+You **must create a configuration file**  `/etc/v2ray/config.json` in host at first:
+
+```
+$ mkdir -p /etc/v2ray
+```
+
+A sample in JSON like below:
+
+```
+{
+  "log" : {
+    "access": "/var/log/v2ray/access.log",
+    "error": "/var/log/v2ray/error.log",
+    "loglevel": "warning"
+  },
+  "inbounds": [{
+    "port": 9000,
+    "protocol": "vmess",
+    "settings": {
+      "clients": [
+        {
+          "id": "11c2a696-0366-4524-b8f0-9a9c21512b02",
+          "level": 1,
+          "alterId": 64
+        }
+      ]
+    }
+  }],
+  "outbounds": [{
+    "protocol": "freedom",
+    "settings": {}
+  }]
+}
+```
+
+Or generate a configuration file online by [https://tools.sprov.xyz/v2ray/](https://tools.sprov.xyz/v2ray/)
+
+There is an example to start a container that listen on port `9000`, run as a V2Ray server like below:
+
+```bash
+$ docker run -d -p 9000:9000 --name v2ray --restart=always -v /etc/v2ray:/etc/v2ray teddysun/v2ray
+```
+
+**Warning**: The port number must be same as configuration and opened in firewall.
+
+[1]: https://github.com/v2ray/v2ray-core
+[2]: https://docs.docker.com/
+[3]: https://docs.docker.com/install/
+[4]: https://hub.docker.com/r/teddysun/v2ray/