update readme for 1.2.4

README.md

-Introduction
-============
+# ActEV CLI README
+
+## Introduction
 
 Consult the documentation to learn more about the CLI: [introduction](doc/introduction.md)
 
@@ -10,12 +11,9 @@ This repository contains:
 
 You should fork the project and use the `master` branch in order to implement the entry point methods and get the updates.
 
-Test it
-
-============
+## Test it
 
-Get the CLI
------------
+### Get the CLI
 
 **Requirements:** python > 3.7
 
@@ -25,8 +23,7 @@ Clone the repository:
 git clone https://gitlab.kitware.com/actev/diva_evaluation_cli.git
 ```
 
-Install it
-----------
+### Install it
 
 * Go into the clone of this repository:
 
@@ -44,8 +41,7 @@ See `diva_evaluation_cli/bin/install.sh -h` for more options. If using `--all`,
 
 N.B.: We recommend to set the `-c` and `-s` options to what will be used as `system_cache_dir` by the entry_points ; otherwise, some operations like `validate-execution` will likely fail.
 
-Test the installation
----------------------
+### Test the installation
 
 Run the following command:
 
@@ -55,12 +51,9 @@ actev
 
 You should be able to see the available subcommands.
 
-Usage
-
-=====
+## Usage
 
-Command line
-------------
+### Command line
 
 Run the following command to obtain help with the CLI:
 
@@ -68,17 +61,13 @@ Run the following command to obtain help with the CLI:
 actev -h
 ```
 
-Documentation
--------------
+### Documentation
 
 Consult the documentation to have information: [CLI](doc/cli_commands/index.md)
 
-Fork it and develop your own implementation
+## Fork it and develop your own implementation
 
-===========================================
-
-Fork it
--------
+### Fork it
 
 Click on the “Fork” button to make a copy of the repository in your own space and add this repository as a remote upstream to get the latest updates
 
@@ -86,8 +75,7 @@ Click on the “Fork” button to make a copy of the repository in your own spac
 git remote add upstream https://gitlab.kitware.com/actev/diva_evaluation_cli.git
 ```
 
-Update it
----------
+### Update it
 
 Execute the following commands to update it:
 
@@ -97,17 +85,20 @@ git checkout master
 git rebase upstream/master
 ```
 
-Develop it
-----------
+### Develop it
 
-The CLI components are included in the `bin` directory, you do not have to modify it. 
-To add your code, you simply have to implement the methods in `src/entry_points`. 
+The CLI components are included in the `bin` directory, you do not have to modify it.
+To add your code, you simply have to implement the methods in `src/entry_points`.
 
-We suggest you to call your scripts in the entry point methods and store them in `src`. 
+We suggest you to call your scripts in the entry point methods and store them in `src`.
 More information about the development and the update of the CLI here: [development](doc/development.md)
 
-Contact
+:warning: Since release 1.2.4, we made sure the content of `/bin` from **your** CLI will be ignored. For example, if you used to edit `/bin/install.sh`, your submissions will likely fail from now. The best way is to move this kind of files/scripts into entry-points `actev-experiment-init` and/or `actev-system-setup`.
+
+:warning: Since release 1.2.4, the CLI installation supports [conda](https://docs.conda.io/en/latest/) environments. This is now the default way for installing the CLI dependencies, **however if you wish to stick with `pip`, you will have to remove `environment.yml` from your CLI.
+
+:warning: Since release 1.2.4, the entry-point `validate-system` requires the existence of a `LICENSE.txt` file at the root of your project.
 
-=======
+## Contact
 
 * diva-nist@nist.gov