converter cli + tests

.gitlab-ci.yml

@@ -71,7 +71,8 @@ stages:
     - pwd
     - apt-get update -y
     - apt install -y python3-pip
-    - apt install -y python3.10
+    - apt install -y python3.10 python-is-python3
+#    - apt install -y python-is-python3
     - python --version
     - locate python
     - apt install -y git
@@ -117,6 +118,7 @@ pages:
     - apt-get -y update
     - apt install -y git
     - apt install -y python3-pip
+    - apt install -y python3.10 python-is-python3
     - apt install -y inkscape pdftk # pdftk to grap pdf pages (only for converter; can probably be omitted).
     - apt install -y latexmk  poppler-utils # latexmk and pdftocairo
     - DEBIAN_FRONTEND='noninteractive' apt install -y texlive-latex-recommended texlive-latex-extra texlive-science pdf2svg