Add GitLab CI to run tests on push

.gitlab-ci.yml

@@ -0,0 +1,25 @@
+stages:
+  - test
+
+variables:
+  PIP_CACHE_DIR: "$CI_PROJECT_DIR/.cache/pip"
+
+cache:
+  paths:
+    - .cache/pip
+    - .venv/
+
+test:
+  stage: test
+  image: python:3.11
+  before_script:
+    - python -m venv .venv
+    - source .venv/bin/activate
+    - pip install --upgrade pip
+    - pip install pytest pytest-asyncio aiofiles aiohttp
+  script:
+    - source .venv/bin/activate
+    - pytest tests/ -v --tb=short
+  rules:
+    - if: $CI_PIPELINE_SOURCE == "push"
+    - if: $CI_PIPELINE_SOURCE == "merge_request_event"