Containerize Application via Dockerfile

Dockerfile

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+FROM python:3.11-slim
+
+# Set the working directory inside the container
+WORKDIR /app
+
+# Set environment variables
+# Prevents Python from writing pyc files to disk
+ENV PYTHONDONTWRITEBYTECODE=1
+# Prevents Python from buffering stdout and stderr
+ENV PYTHONUNBUFFERED=1
+
+# Upgrade pip
+RUN pip install --upgrade pip
+
+# Copy the Django project and install dependencies
+COPY requirements.txt /app/
+
+# Run this command to install all dependencies
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY . /app/
+
+# Schedule health check
+RUN apt-get update && apt-get install -y curl && rm -rf /var/lib/apt/lists/*
+HEALTHCHECK --interval=10s --timeout=3s --start-period=10s --retries=3 CMD ["curl", "--silent", "http://localhost:8000/health/"]
+
+# Run server (multi-threaded)
+RUN /app/manage.py migrate --no-input
+ENTRYPOINT ["gunicorn", "app.wsgi:application", "--bind", "0.0.0.0:8000"]

app/asgi.py

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+"""
+ASGI config for app project.
+
+It exposes the ASGI callable as a module-level variable named ``application``.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/5.2/howto/deployment/asgi/
+"""
+
+import os
+
+from django.core.asgi import get_asgi_application
+
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'app.settings')
+
+application = get_asgi_application()

app/settings.py

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+"""
+Django settings for app project.
+
+Generated by 'django-admin startproject' using Django 5.2.8.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/5.2/topics/settings/
+
+For the full list of settings and their values, see
+https://docs.djangoproject.com/en/5.2/ref/settings/
+"""
+
+from pathlib import Path
+
+# Build paths inside the project like this: BASE_DIR / 'subdir'.
+BASE_DIR = Path(__file__).resolve().parent.parent
+
+
+# Quick-start development settings - unsuitable for production
+# See https://docs.djangoproject.com/en/5.2/howto/deployment/checklist/
+
+# SECURITY WARNING: keep the secret key used in production secret!
+SECRET_KEY = 'django-insecure-dulqz#%k5aq8%cdx02%55tm9+2q1b%qogh%2#6jbx3zn4ab5pb'
+
+# SECURITY WARNING: don't run with debug turned on in production!
+DEBUG = True
+
+ALLOWED_HOSTS = []
+
+
+# Application definition
+
+INSTALLED_APPS = [
+    "drf_yasg",
+    "rest_framework",
+
+    'django.contrib.admin',
+    'django.contrib.auth',
+    'django.contrib.contenttypes',
+    'django.contrib.sessions',
+    'django.contrib.messages',
+    'django.contrib.staticfiles',
+]
+
+MIDDLEWARE = [
+    'django.middleware.security.SecurityMiddleware',
+    'django.contrib.sessions.middleware.SessionMiddleware',
+    'django.middleware.common.CommonMiddleware',
+    'django.middleware.csrf.CsrfViewMiddleware',
+    'django.contrib.auth.middleware.AuthenticationMiddleware',
+    'django.contrib.messages.middleware.MessageMiddleware',
+    'django.middleware.clickjacking.XFrameOptionsMiddleware',
+]
+
+ROOT_URLCONF = 'app.urls'
+
+TEMPLATES = [
+    {
+        'BACKEND': 'django.template.backends.django.DjangoTemplates',
+        'DIRS': [],
+        'APP_DIRS': True,
+        'OPTIONS': {
+            'context_processors': [
+                'django.template.context_processors.request',
+                'django.contrib.auth.context_processors.auth',
+                'django.contrib.messages.context_processors.messages',
+            ],
+        },
+    },
+]
+
+WSGI_APPLICATION = 'app.wsgi.application'
+
+
+# Database
+# https://docs.djangoproject.com/en/5.2/ref/settings/#databases
+
+DATABASES = {
+    'default': {
+        'ENGINE': 'django.db.backends.sqlite3',
+        'NAME': BASE_DIR / 'db.sqlite3',
+    }
+}
+
+
+# Password validation
+# https://docs.djangoproject.com/en/5.2/ref/settings/#auth-password-validators
+
+AUTH_PASSWORD_VALIDATORS = [
+    {
+        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
+    },
+]
+
+
+# Internationalization
+# https://docs.djangoproject.com/en/5.2/topics/i18n/
+
+LANGUAGE_CODE = 'en-us'
+
+TIME_ZONE = 'UTC'
+
+USE_I18N = True
+
+USE_TZ = True
+
+
+# Static files (CSS, JavaScript, Images)
+# https://docs.djangoproject.com/en/5.2/howto/static-files/
+
+STATIC_URL = 'static/'
+
+# Default primary key field type
+# https://docs.djangoproject.com/en/5.2/ref/settings/#default-auto-field
+
+DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'

app/urls.py

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+"""
+URL configuration for app project.
+
+The `urlpatterns` list routes URLs to views. For more information please see:
+    https://docs.djangoproject.com/en/5.2/topics/http/urls/
+Examples:
+Function views
+    1. Add an import:  from my_app import views
+    2. Add a URL to urlpatterns:  path('', views.home, name='home')
+Class-based views
+    1. Add an import:  from other_app.views import Home
+    2. Add a URL to urlpatterns:  path('', Home.as_view(), name='home')
+Including another URLconf
+    1. Import the include() function: from django.urls import include, path
+    2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
+"""
+from django.contrib import admin
+from django.urls import path
+import app.views
+
+
+urlpatterns = [
+    path('admin/', admin.site.urls),
+
+    # Service Status
+    # - `HEALTHCHECK` support for Docker Container
+    path('health/', app.views.health),
+
+    # Swagger Support
+    path('swagger/', app.views.schema.with_ui('swagger')),
+    path('swagger/(?P<format>\\.json|\\.yaml)', app.views.schema.without_ui()),
+]

app/views.py

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+from django.http import HttpRequest
+from django.http import HttpResponse
+from django.views.decorators.http import require_http_methods
+from drf_yasg.openapi import Contact
+from drf_yasg.openapi import Info
+from drf_yasg.utils import swagger_auto_schema
+from drf_yasg.views import get_schema_view
+from rest_framework.permissions import AllowAny
+
+
+schema = get_schema_view(
+    info=Info(
+        title="Time Limit Exceeded :: Authentication API",
+        default_version='1.0.0',
+        description="",
+        contact=Contact(email="202115064@sangmyung.kr"),
+    ),
+    public=True,
+    permission_classes=[AllowAny],
+)
+
+
+@require_http_methods(["GET"])
+@swagger_auto_schema(method='get')
+def health(request: HttpRequest):
+    return HttpResponse(status=200)

app/wsgi.py

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+"""
+WSGI config for app project.
+
+It exposes the WSGI callable as a module-level variable named ``application``.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/5.2/howto/deployment/wsgi/
+"""
+
+import os
+
+from django.core.wsgi import get_wsgi_application
+
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'app.settings')
+
+application = get_wsgi_application()

manage.py

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+#!/usr/bin/env python
+"""Django's command-line utility for administrative tasks."""
+import os
+import sys
+
+
+def main():
+    """Run administrative tasks."""
+    os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'app.settings')
+    try:
+        from django.core.management import execute_from_command_line
+    except ImportError as exc:
+        raise ImportError(
+            "Couldn't import Django. Are you sure it's installed and "
+            "available on your PYTHONPATH environment variable? Did you "
+            "forget to activate a virtual environment?"
+        ) from exc
+    execute_from_command_line(sys.argv)
+
+
+if __name__ == '__main__':
+    main()

requirements.txt

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+django
+djangorestframework
+drf-yasg
+gunicorn