added docker documentation

DOCKER.md

@@ -0,0 +1,28 @@
+# Sengi's Docker documentation
+
+Here is some more detailed informations for Sengi's Docker users.
+
+## Deploy Sengi's
+
+Execute:
+
+```
+docker run -d -p 80:80 nicolasconstant/sengi
+```
+
+Sengi will then be available on port 80
+
+## Landing page 
+
+Sengi's docker contains a landing page so that you can open a pop-up easily.<br />
+It's available in ```https://your-host/start/index.html```
+
+## Personalize the Privacy Statement
+
+You can personalize the privacy statement by linking it as follow:
+
+```
+docker run -d -p 80:80 -v /Path/privacy.html:/app/assets/docs/privacy.html nicolasconstant/sengi
+```
+
+

README.md

@@ -32,6 +32,8 @@ A docker image is available for auto-hosting your own Sengi webapp!
 docker run -d -p 80:80 nicolasconstant/sengi
 ```
 
+Find more informations [here](https://github.com/NicolasConstant/sengi/blob/master/DOCKER.md).
+
 The docker image also provide a landing page so that you can open a pop-up really easily. <br />
 It's available in ```https://your-host/start/index.html```