Fix missing libs for pip install in CI/CD (copy from datacatalog)

.gitignore

 **__pycache__/
+dockers/.env
 .vscode/*
 *.pyc
 

.gitlab-ci.yml

 default:
-  image: python:3-slim
+  image: python:3.9-slim
+
+# before script copied from gitlab docs
+before_script:
+  - 'command -v ssh-agent >/dev/null || ( apt-get update -y && apt-get install openssh-client gcc libxslt-dev libffi-dev libssl-dev build-essential python3-dev -y )'
+  - eval $(ssh-agent -s)
+  - echo "$SSH_PRIVATE_KEY" | tr -d '\r' | ssh-add -
+  - mkdir -p ~/.ssh
+  - chmod 700 ~/.ssh
 
 stages:
   - test