add: task 1, task 2

Author: Gpshfrd

.github/workflows/python-ci.yml

@@ -0,0 +1,49 @@
+name: Python CI
+
+on:
+  push:
+    paths:
+      - "app_python/**"
+      - ".github/workflows/python-ci.yml"
+  pull_request:
+    paths:
+      - "app_python/**"
+
+jobs:
+  test-and-build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+          cache: "pip"
+
+      - name: Install dependencies
+        run: |
+          pip install -r app_python/requirements.txt
+          pip install -r app_python/requirements-dev.txt
+
+      - name: Run tests
+        run: |
+          cd app_python
+          pytest
+
+      - name: gpshfrd
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v6
+        with:
+          context: app_python
+          push: true
+          tags: |
+            ${{ secrets.DOCKERHUB_USERNAME }}/devops-info-python:${{ env.VERSION }}
+            ${{ secrets.DOCKERHUB_USERNAME }}/devops-info-python:latest

app_python/docs/LAB03.md

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+## Overview
+Pytest was chosen because it has simple syntax and is well suited for testing Flask applications.
+The CI workflow runs on push and pull requests to app_python/.
+Calendar Versioning was used because this is a continuously deployed service.
+
+## Workflow Evidence
+- GitHub Actions: green successful run
+- Docker Hub: image published with tags `latest` and `2026.02`
+- Local tests: pytest passed successfully
+
+## Best Practices Implemented
+- Dependency caching to speed up CI runs
+- Fail fast strategy: Docker build runs only after tests pass
+- Secrets used for Docker Hub authentication
+
+## Challenges
+- Initial test client setup for Flask
+- Fixing import paths for pytest
+- Docker authentication in CI
+- The issue occurred because pytest was executed using the global installation instead of the virtual environment. Running tests via python -m pytest ensured correct dependency resolution.

app_python/docs/screenshots/lab03/tests_passed.png

@@ -1 +1,2 @@
-Flask==3.1.0
+Flask==3.1.0
+pytest

app_python/requirements.txt

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+from app import app
+
+def test_health_endpoint():
+    client = app.test_client()
+    response = client.get('/health')
+
+    assert response.status_code == 200
+
+    data = response.get_json()
+    assert data["status"] == "healthy"

app_python/tests/test_health.py

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+import json
+from app import app
+
+def test_root_endpoint():
+    client = app.test_client()
+    response = client.get('/')
+
+    assert response.status_code == 200
+
+    data = response.get_json()
+    assert isinstance(data, dict)
+
+    assert "service" in data
+    assert "system" in data
+    assert "runtime" in data