diff --git a/.env b/.env
index b750b32..ecbc297 100644
--- a/.env
+++ b/.env
@@ -1 +1,5 @@
+# A name for this Docker Compose application, it can be whatever you like
 COMPOSE_PROJECT_NAME=jupyterhub
+
+# The server where this JupyterHub server is hosted
+HOST=jupyter.ens.uvsq.fr
\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..35f4e75
--- /dev/null
+++ b/README.md
@@ -0,0 +1,64 @@
+# JupyterHub deployment in use at Université de Versailles
+
+This is a [JupyterHub](https://jupyter.org/hub) deployment based on
+Docker currently in use at [Université de
+Versailles](https://jupyter.ens.uvsq.fr/).
+
+## Features
+
+- Containerized single user Jupyter servers, using
+  [DockerSpawner](https://github.com/jupyterhub/dockerspawner);
+- Central authentication to the University CAS server;
+- User data persistence;
+- HTTPS proxy.
+
+## Learn more
+
+This deployment is described in depth in [this blog
+post](https://opendreamkit.org/2018/10/17/jupyterhub-docker/).
+
+### Adapt to your needs
+
+This deployment is ready to clone and roll on your own server. Read
+the [blog
+post](https://opendreamkit.org/2018/10/17/jupyterhub-docker/) first,
+to be sure you understand the configuration.
+
+Then, if you like, clone this repository and apply (at least) the
+following changes:
+
+- In [`.env`](.env), set the variable `HOST` to the name of the server you
+  intend to host your deployment on.
+- In [`reverse-proxy/traefik.toml`](reverse-proxy/traefik.toml), edit
+  the paths in `certFile` and `keyFile` and point them to your own TLS
+  certificates. Possibly edit the `volumes` section in the
+  `reverse-proyx` service in
+  [`docker-compose.yml`](docker-compose.yml).
+- In
+  [`jupyterhub/jupyterhub_config.py`](jupyterhub/jupyterhub_config.py),
+  edit the *"Authenticator"* section according to your institution
+  authentication server.  If in doubt, [read
+  here](https://jupyterhub.readthedocs.io/en/stable/getting-started/authenticators-users-basics.html).
+
+Other changes you may like to make:
+
+- Edit [`jupyterlab/Dockerfile`](jupyterlab/Dockerfile) to include the
+  software you like. Do not forget to change
+  [`jupyterhub/jupyterhub_config.py`](jupyterhub/jupyterhub_config.py)
+  accordingly, in particular the *"user data persistence"* section.
+
+### Run!
+
+Once you are ready, build and launch the application with
+
+```
+docker-compose build
+docker-compose up -d
+```
+
+Read the [Docker Compose manual](https://docs.docker.com/compose/) to
+learn how to manage your application.
+
+## Acknowledgements
+
+Work partially funded by [OpenDreamKit](https://opendreamkit.org/).
diff --git a/docker-compose.yml b/docker-compose.yml
index a779dad..bb7b05a 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -9,12 +9,13 @@ services:
       - /var/run/docker.sock:/var/run/docker.sock
       - jupyterhub_data:/srv/jupyterhub
     environment:
-      DOCKER_JUPYTER_CONTAINER: jupyterlab_img
-      DOCKER_NETWORK_NAME: ${COMPOSE_PROJECT_NAME}_default
-      HUB_IP: jupyterhub
+      - DOCKER_JUPYTER_CONTAINER=jupyterlab_img
+      - DOCKER_NETWORK_NAME=${COMPOSE_PROJECT_NAME}_default
+      - HUB_IP=jupyterhub
+      - HOST
     labels:
       - "traefik.enable=true"
-      - "traefik.frontend.rule=Host:jupyter.ens.uvsq.fr"
+      - "traefik.frontend.rule=Host:${HOST}"
     restart: on-failure
 
   jupyterlab:
diff --git a/jupyterhub/jupyterhub_config.py b/jupyterhub/jupyterhub_config.py
index baf0ff5..c16c5d1 100644
--- a/jupyterhub/jupyterhub_config.py
+++ b/jupyterhub/jupyterhub_config.py
@@ -14,7 +14,7 @@
 c.CASAuthenticator.cas_service_validate_url = 'https://cas.uvsq.fr/serviceValidate'
 
 # The service URL the CAS server will redirect the browser back to on successful authentication.
-c.CASAuthenticator.cas_service_url = 'https://sage.prism.uvsq.fr/hub/login'
+c.CASAuthenticator.cas_service_url = 'https://%s/hub/login' % os.environ['HOST']
 
 c.Authenticator.admin_users = { 'lucadefe' }