add gitlab ci cd

.gitlab-ci.yml

+stages:
+  - install
+  - test
+  - deploy
+
+variables:
+  VENV_DIR: .venv
+  PIP_CACHE_DIR: $CI_PROJECT_DIR/.pip_cache
+
+cache:
+  paths:
+    - $PIP_CACHE_DIR
+
+before_script:
+  - python -m venv $VENV_DIR
+  - source $VENV_DIR/Scripts/activate
+  - pip install --upgrade pip
+  - pip install -r requirements.txt --cache-dir $PIP_CACHE_DIR
+
+install_dependencies:
+  stage: install
+  script:
+    - echo "Dependencies installed successfully."
+
+run_tests:
+  stage: test
+  script:
+    - pytest --maxfail=5 --disable-warnings
+  artifacts:
+    when: always
+    paths:
+      - tests/reports/
+    reports:
+      junit: tests/reports/junit.xml
+
+deploy:
+  stage: deploy
+  script:
+    - echo "Deploying application..."
+    - python run_app.py
+  only:
+    - main