Update readme & fix CI jobs

.gitlab-ci.yml

@@ -16,7 +16,7 @@ pages:
     paths:
       - public
   only:
-    - main
+    - master
     - develop
 
 conda_build:
@@ -33,7 +33,7 @@ conda_build:
     paths:
       - conda-bld
   only:
-    - main
+    - master
 
 conda_upload:
   stage: deploy
@@ -43,4 +43,4 @@ conda_upload:
     - anaconda --token=$ANACONDA_TOKEN upload conda-bld/osx-64/lpy_tools-* --user mosaic --label main
     - anaconda --token=$ANACONDA_TOKEN upload conda-bld/win-64/lpy_tools-* --user mosaic --label main
   only:
-    - main
+    - master

README.md

@@ -7,12 +7,17 @@ Most of the tools are meant to be used with the L-Py python API in a python file
 
 ### Install conda package
 
-You can install the conda package with:
+You can install the `openalea.lpy` & `lpy_tools` conda packages in an environment named `lpy` with python 3.9 as follows:
 
 ```shell
+conda create -n lpy python=3.9
+conda activate lpy
+conda install openalea.lpy -c fredboudon -c conda-forge
 conda install lpy_tools -c mosaic -c fredboudon -c conda-forge
 ```
 
+:warning: You many need to install OpenGL system dependency. On Ubuntu `sudo apt install freeglut3-dev`.
+
 ### Install from sources
 
 To **create a new conda environment** (will be named `lpy_tools`) and install the required dependencies: