Update gitlab jobs

gitlab-ci/build.yml

@@ -1,6 +1,6 @@
 static:
   stage: build
-  image: node:12
+  image: node:12-bullseye
   before_script:
     - npm install
   script:

gitlab-ci/lint.yml

@@ -1,15 +1,12 @@
 python-linting:
   stage: lint
-  image: python:3.7
+  image: python:3.9-bullseye
   before_script:
-    - pip install poetry --quiet
-    - poetry config cache-dir ~/.cache/poetry
-    - poetry config virtualenvs.in-project true
-    - poetry install --no-interaction --quiet
+    - pip install -r requirements/production.txt -r requirements/development.txt
   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
+    - isort src/ --check-only --recursive
+    - black src/ --line-length 88 --check
+    - autoflake src/ --check --recursive --remove-all-unused-imports --ignore-init-module-imports
   only:
     refs:
       - development
@@ -17,7 +14,7 @@ python-linting:
 
 javascript-linting:
   stage: lint
-  image: node:12
+  image: node:12-bullseye
   before_script:
     - npm install
   script:

gitlab-ci/test.yml

@@ -4,20 +4,16 @@ python-tests:
   services:
     - postgres:11
     - memcached:1.5.22
-  image: python:3.7
+  image: python:3.9-bullseye
   before_script:
-    - pip install poetry --quiet
-    - poetry --version
-    - poetry config cache-dir .cache/poetry
-    - poetry config virtualenvs.in-project true
-    - poetry install --no-interaction --extras sentry
+    - pip install -r requirements/production.txt -r requirements/development.txt
   script:
-    - poetry run coverage run src/manage.py test newsreader
-    - poetry run coverage report
+    - ./src/manage.py test newsreader
+    - coverage report
 
 javascript-tests:
   stage: test
-  image: node:12
+  image: node:12-bullseye
   before_script:
     - npm install
   script: