update installation instructions

README.md

@@ -8,13 +8,14 @@ This plugin contains 2 types of calculations:
 - `numodis.raw`: Calculation making use of usual NUMODIS input files (`data_files.xml`).
 - `numodis.base`: Calculation making use of parameter based input. (TODO)
 
-It also includes 1 workflow:
-- `edgeloop2`: 6 steps workflow using Numodis and [LAMMPS](https://www.lammps.org/).
-
 ## Installation
 
+Clone the repository and install the python package using pip:
+
 ```shell
-pip install aiida-numodis
+git clone https://gricad-gitlab.univ-grenoble-alpes.fr/diamond/aiida/libraries/aiida-numodis.git
+cd aiida-numodis
+pip install .
 ```
 
 ## Documentation
@@ -54,7 +55,6 @@ The plugin adds some commands to verdi to manipulate NUMODIS data. Explore them
 verdi data --help
 ```
 
-
 ## Development
 
 Contribution is very welcomed.