Update project / gitlab ci settings

gitlab-ci/lint.yml

@@ -0,0 +1,22 @@
+python-linting:
+  stage: lint
+  allow_failure: true
+  image: python:3.7.4-slim-stretch
+  before_script:
+    - pip install poetry
+    - poetry config cache-dir ~/.cache/poetry
+    - poetry config virtualenvs.in-project true
+    - poetry install --no-interaction
+  script:
+    - poetry run isort src/ --check-only --recursive
+    - poetry run black src/ --line-length 88 --check
+    - poetry run autoflake src/ --check --recursive --remove-all-unused-imports --ignore-init-module-imports
+
+javascript-linting:
+  stage: lint
+  allow_failure: true
+  image: node:12
+  before_script:
+    - npm install
+  script:
+    - npm run lint