docker testing (doc)

test.md

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+Testing
+---
+
+## Docker
+
+There are three parts, server, client and, the bouncer itself.
+
+### Server
+
+```shell
+docker build -f docker/Dockerfile-test-server -t netbounce:server .
+```
+
+#### Run
+
+```shell
+docker run -it --rm netbounce:server test-server --name hello --udp "0.0.0.0:8123" --debug
+```
+
+### Client
+
+```shell
+docker build -f docker/Dockerfile-test-client -t netbounce:client .
+```
+
+### Bouncer
+
+```shell
+docker build -f docker/Dockerfile -t netbounce:test .
+```
+