CONTRIBUTING.md: add config examples

CONTRIBUTING.md

@@ -49,6 +49,12 @@ sed -i `s/<existing_version>/<new_version>/g` <new_version>.lua
 To propose a new module, use an existing module as a template to build the
 corresponding `apps/<software>/<version>` and `modulefiles/<software>/<version>` directory.
 
+You can look at the following modules to have examples of :
+
+- Python tools : [MultiQC install.sh](https://gitlab.biologie.ens-lyon.fr/PSMN/modules/blob/master/apps/MultiQC/install_1.0.sh) and [MultiQC .lua](https://gitlab.biologie.ens-lyon.fr/PSMN/modules/blob/master/modulefiles/MultiQC/1.0.lua)
+- Compiled tools : [UrQt install.sh](https://gitlab.biologie.ens-lyon.fr/PSMN/modules/blob/master/apps/UrQt/install_d62c1f8.sh)
+- Java tools : [Trimmomatic install.sh](https://gitlab.biologie.ens-lyon.fr/PSMN/modules/blob/master/apps/Trimmomatic/install_0.36.sh) and [nextflow .lua](https://gitlab.biologie.ens-lyon.fr/PSMN/modules/blob/master/modulefiles/nextflow/0.28.2.lua)
+
 ## Making your module available to the LBMC
 
 To make your module available to the LBMC you must have a `install_<new_version>.sh` script working without errors on the E5 compilation servers and you must be able to load the correspond module and run it.