- in notes : added duplicator infos

- in wp dockerfil : added php7-session
- in wp entrypoint : mv creation of plugins symlinks outside
  "if wp is installed" block

notes.md

@@ -4,6 +4,10 @@
 - `docker exec -ti <container-name> bash` to run bash inside a running container
 - `docker logs <container_name>` to see the logs on standard output of a container
 - `docker ps` to list the container, and see their names
+- [duplicator](https://duplicator.com/knowledge-base/classic-install/)
+	in installer.php :
+	- delete first blank line
+	- close last line comment
 
 #### todo :