Update file .gitlab-ci.yml

.gitlab-ci.yml

-image: centos:centos7
 pages:
+  needs: []
+  image: python:3.9
   script:
-    - yum install -y epel-release wget
-    - wget https://repo.ius.io/ius-release-el7.rpm
-    - rpm -Uvh ius-release-*.rpm
-    - yum provides python3.6
-    - yum install -y python36u python36u-libs python36u-devel python36u-pip
-    - pip3.6 install -U pip
-    - pip3.6 install virtualenv
-    - virtualenv -p python3.6 venv
-    - . venv/bin/activate
   - pip3 install sphinx
-    - yum install -y make
-    - pip3 install sphinx
-    - pip3 install sphinxcontrib-bibtex sphinx_rtd_theme sphinx-argparse
-    - pip3 install -r requirements.txt
-    - pip3 install ../jass_preprocessing/
+  - pip install sphinxcontrib-bibtex
+  - pip3 install sphinx_rtd_theme sphinx-argparse
+  - pip install -e .
+  - pip install -r requirements.txt
   - cd doc
-    - sphinx-apidoc -f -o ./source/_autosummary/ ../jass_preprocessing/
   - make html
-    - mv _build/html/ ../public
+  - mv build/html/ ../public
   artifacts:
     paths:
     - public