diff --git a/README.md b/README.md
index eff2b5b..c5c26a1 100644
--- a/README.md
+++ b/README.md
@@ -3,19 +3,31 @@
 Docker image based on nginx official one for [sigal](http://sigal.saimon.org/en/latest/) gallery.
 
 Run with :
-    docker run -p 80:80 -v /path/to/your/pictures/:/pictures --name sigal -d remche/sigal
 
-default configuration :
-- put gallery in /usr/share/nginx/html. You can use a docker volume if you want it permanent :
-    docker run -p 80:80 -v /path/to/your/pictures/:/pictures -v sigal-html:/usr/share/nginx/html --name sigal -d remche/sigal
-- use the galleria theme ;
-- keep original, and symlink to ;
+    docker run -p 80:80 -v /path/to/your/pictures/:/pictures --name sigal-ct -d remche/sigal
+
+
+Default configuration use the galleria theme, keep original and put gallery in /usr/share/nginx/html. You can use a docker volume if you want it permanent :
+
+    docker run -p 80:80 -v /path/to/your/pictures/:/pictures -v sigal-html:/usr/share/nginx/html --name sigal-ct -d remche/sigal
+
+    
+If you want to override this conf, you can use your own sigal.conf.py :
+
+    docker run -p 80:80 -v /path/to/your/pictures/:/pictures -v/path/to/your/sigal.conf.py:/opt/sigal.conf.py --name sigal-ct -d remche/sigal
+
+
+You can set a basic authentication in htpasswd format by setting HTPASSWD env variable :
+
+    docker run -p 80:80 -v /path/to/your/pictures/:/pictures -e HTPASSWD='foo:$apr1$odHl5EJN$KbxMfo86Qdve2FH4owePn.' --name sigal-ct -d remche/sigal
 
-If you want to override this, you can use your own sigal.conf.py :
-    docker run -p 80:80 -v /path/to/your/pictures/:/pictures -v/path/to/your/sigal.conf.py:/opt/sigal.conf.py --name sigal -d remche/sigal
 
-You can set a basic authentication in htpasswd format setting HTPASSWD env variable :
-    docker run -p 80:80 -v /path/to/your/pictures/:/pictures -e HTPASSWD='foo:$apr1$odHl5EJN$KbxMfo86Qdve2FH4owePn.' --name sigal -d remche/sigal
 You might then use SSL with [nginx-proxy](https://hub.docker.com/r/jwilder/nginx-proxy/).
 
 
+You can use the following command to regenerate gallery :
+
+    docker exec sigal-ct sigal build
+
+
+Using a cron or incron to run it is a good way to keep your gallery up to date.