diff --git a/README.md b/README.md
index 7b5c567224208d8586dafa71d63743e05bdf1cc5..1656ece369e07e0d633a54dda6246bee28a03d98 100644
--- a/README.md
+++ b/README.md
@@ -1,35 +1,47 @@
-#
-To run the docker
+# Introduction
+
+We would like to explore the potential of docker in our community.
+This repoitory is there for a first attempt.
+
+## Main usse case
+I have a Mac laptop and I would like to work locally on my Mac in a UNIX system. 
+Some of the reasons are
+- work directly on lxplus can be slow (dependent on the node). The advantage of lxplus is that it mounts `afs`, `eos`, `cvmfs` and the HTCondor interface.  
+- work on SWAN can be slow and it does not mount `afs` - this can be problematic for the MAD-X mask.
+- python C-compiled package can have difficulty to be maintained also for Mac/Win, e.g., `cpymad` does not work properly on Mac 
+(I can install it on Mad and run small lattice, but when I try the larger ones, namely LHC, it fails).
+I started to use a simple docker as a workaround (the same I used for CAS/JUAS courses), typically I use `jupiter lab` and my experience in term of performance and stability is very positive.
+- I would like to mount `eos` and `afs` without suffering to much, and I would like that the possibility to share my setup not only via a set of wikis but also with press-one-button solution. With this spirit, one could prepare and share several `env`, e.g,. to track particles, to access NXCALS,...
+
+For the moment, I am considering that you have already installed in your Mac (local host) `afs` - it is quite easy to do so, I tested only on Catalina.
+You do not need to install `eos` on your Mac. This is installed inside the container (thanks to the help of Fabio Luchetti).  
+
+# To run the docker
 
 To lauch the docker sterbini/test
 
 ```
-docker run -ti --cap-add SYS_ADMIN --device /dev/fuse sterbini/test
+docker run -ti --cap-add SYS_ADMIN --device /dev/fuse gitlab-registry.cern.ch/sterbini/be-abp-docker:$TAG
 ```
 
-I did n case you want to mount a local folder this has to be **shared** with Docker
-(I did it with Docker Desktop on my Mac)
+where you can find the $TAG you want at https://gitlab.cern.ch/sterbini/be-abp-docker/container_registry/9245. Probably you want the latest tag. 
+
+**At the time of the writing (2021.03.24) the latest tag was 9ac88918.**
+
+In case you want to mount a local folder, this has to be **shared** with Docker Docker (I did it with Docker Desktop on my Mac)
 and then
 
 ```
-docker run -v /afs:/afs  -ti --cap-add SYS_ADMIN --device /dev/fuse sterbini/test
+docker run -v /afs:/afs -ti --cap-add SYS_ADMIN --device /dev/fuse gitlab-registry.cern.ch/sterbini/be-abp-docker:$TAG
 ```
 
-I took the kerberos configuration from lxplus.
-
-
 When you are in the docker you have to do:
 
 ``` bash
-kinit sterbini
+kinit $YOUR_NICE_LOGIN_NAME
 ```
 
 # To make the docker
-You have the docker at
-
-```
-/Users/sterbini/CERNBox/2021/docker/eos_docker
-```
 
 To build the docker
 
@@ -37,21 +49,34 @@ To build the docker
 docker build . -t sterbini/test
 ```
 
-## To export the Xgraphics on mac
+## To export the X-graphics on mac
 From https://medium.com/@mreichelt/how-to-show-x11-windows-within-docker-on-mac-50759f4b65cb
 
 - Install the latest XQuartz X11 server and run it
 - Activate the option ‘Allow connections from network clients’ in XQuartz settings
 - Quit & restart XQuartz (to activate the setting)
-- On the host do 
-```
+
+On the local host (Mac) do 
+
+```bash
 xhost + 127.0.0.1
 ```
-And when you run the docker add
-```
+
+And when you run the docker by adding 
+
+```bash
 -e DISPLAY=host.docker.internal:0
 ```
-that is
+
+to the `docker run` that is
+
+```bash
+docker run --rm -e DISPLAY=host.docker.internal:0 -p 8889:8888 -ti --cap-add SYS_ADMIN --device /dev/fuse -e GRANT_SUDO=yes gitlab-registry.cern.ch/sterbini/be-abp-docker:$TAG
+```
+
+# To be done
+
 ```
-docker run --rm -e DISPLAY=host.docker.internal:0 -p 8889:8888 -ti --cap-add SYS_ADMIN --device /dev/fuse -e GRANT_SUDO=yes sterbini/test
+docker run --rm -e DISPLAY=host.docker.internal:0 -p 8889:8888 -ti --cap-add SYS_ADMIN --device /dev/fuse -e GRANT_SUDO=yes gitlab-registry.cern.ch/sterbini/be-abp-docker:$TAG
 ```
+