Container update to version 311bca9c

Update the docker image of ICNML to the commit 311bca9c (ICNML/docker@311bca9c)

Regards, the CICD

docker-compose.yml.template

 version: '3.7'
 services:
     web:
-        image: cr.unil.ch/icnml/docker/web:e83cd757
+        image: cr.unil.ch/icnml/docker/web:311bca9c
         ports:
             - 5000:5000
         env_file: