Update .gitlab-ci.yml

.gitlab-ci.yml

-image: continuumio/miniconda:latest
+image: registry-gitlab.pasteur.fr/dsi-tools/docker-images:redhat_ptv
 
 before_script:
-  - conda env create -f PhageTerm_env_3.yml
-  - conda init bash
-  - source ~/.bashrc
-  - conda activate PhageTerm_env_py3
+  - poetry install
+  - poetry shell
+  - export PYTHONPATH=$PYTHONPATH:./phagetermvirome
 
 stages: 
   - tests