feat: Updating the application according to PEP 517/518

Author: Kostiantyn Krykun

.dockerignore

@@ -0,0 +1,28 @@
+# Git
+.git
+.gitignore
+
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.egg-info/
+.eggs/
+dist/
+build/
+.venv/
+venv/
+.pytest_cache/
+
+# IDE
+.idea/
+.vscode/
+
+# Tests
+tests/
+test-report.xml
+.coverage
+
+# Docs
+*.md
+LICENSE

Dockerfile

@@ -1,13 +1,14 @@
-FROM public.ecr.aws/docker/library/python:3.8-slim
+FROM public.ecr.aws/docker/library/python:3.13-slim
 
 WORKDIR /app
 
-# Install required packages
-COPY requirements.txt ./
+# Install build dependencies and the package
+COPY pyproject.toml requirements.txt ./
+COPY version/ ./version/
 RUN pip install --no-cache-dir -r requirements.txt
 
 # Copy the application code
-COPY . .
+COPY app.py ./
 
 # Create a non-root user to run the application
 RUN useradd --create-home appuser

pyproject.toml

@@ -0,0 +1,50 @@
+[build-system]
+requires = ["setuptools>=69.5.1"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "hello_world"
+dynamic = ["version"]
+description = "A simple hello world Flask app"
+readme = "README.md"
+license = "Apache-2.0"
+requires-python = ">=3.13"
+dependencies = [
+    "click==8.1.7",
+    "Flask==3.1.2",
+    "itsdangerous==2.2.0",
+    "Jinja2==3.1.6",
+    "MarkupSafe==3.0.3",
+    "Werkzeug==3.1.5",
+]
+
+[project.optional-dependencies]
+test = [
+    "pytest>=7.4.4",
+    "flake8>=7.0.0",
+    "pylint>=3.0.0",
+]
+dev = [
+    "twine>=5.1.1",
+]
+
+[tool.setuptools.dynamic]
+version = {attr = "version.__version__"}
+
+[tool.setuptools.packages.find]
+include = ["version*"]
+exclude = ["tests*"]
+
+[tool.pytest.ini_options]
+testpaths = ["tests"]
+addopts = "-rsxX -l --tb=short --junitxml=test-report.xml"
+
+[tool.flake8]
+max-line-length = 120
+exclude = [".git", "__pycache__", "build", "dist", "*.egg-info"]
+
+[tool.pylint.messages_control]
+disable = ["C0114", "C0115", "C0116"]
+
+[tool.pylint.format]
+max-line-length = 120

requirements.txt

@@ -1,6 +1,11 @@
+# Runtime dependencies - synced with pyproject.toml
 click==8.1.7
-Flask==3.0.0
-itsdangerous==2.1.2
+Flask==3.1.2
+itsdangerous==2.2.0
 Jinja2==3.1.6
-MarkupSafe==2.1.3
-Werkzeug==3.1.4
+MarkupSafe==3.0.3
+Werkzeug==3.1.5
+pylint>=3.0.0
+flake8>=7.0.0
+pytest>=7.4.4
+twine==6.2.0

setup.py

@@ -0,0 +1 @@
+"""Test package."""

test-requirements.txt

@@ -1,9 +1,9 @@
-"""Unit test for application."""
+"""Unit tests for the Flask application."""
 from app import app
 
 
 def test_hello():
-    """Returns Hello, World."""
+    """Test that the root endpoint returns Hello, World."""
     response = app.test_client().get('/')
 
     assert response.status_code == 200