Install-Docker.md

 ## Use Docker for Fidle
 
+- Pre-requesites:
+   - Docker should be installed on your computer !
+     Check the [download Docker page info](https://docs.docker.com/get-docker/)
 - Get Fidle image<br>
   `docker pull gricad-registry.univ-grenoble-alpes.fr/talks/fidle/fidle_cpu:python3.7`