solution

.dockerignore

@@ -0,0 +1,8 @@
+.git
+.gitignore
+.env
+__pycache__
+*.pyc
+.venv
+media/
+static/

.env.example

@@ -0,0 +1,9 @@
+POSTGRES_USER=your_user
+POSTGRES_PASSWORD=your_password
+POSTGRES_DB=postgres_db
+DB_HOST=db
+DB_PORT=5432
+
+SECRET_KEY=change_me
+DEBUG=1
+ALLOWED_HOSTS=127.0.0.1,localhost

Dockerfile

@@ -0,0 +1,23 @@
+FROM python:3.13-slim
+
+LABEL maintainer="Marek Drządzewski"
+
+ENV PYTHONUNBUFFERED=1
+
+WORKDIR /app
+
+COPY requirements.txt .
+RUN pip install --upgrade pip && pip install -r requirements.txt
+
+COPY . .
+
+RUN adduser \
+    --disabled-password \
+    --no-create-home \
+    django-user
+
+RUN mkdir -p /vol/web \
+    && chown -R django-user:django-user /vol \
+    && chmod -R 755 /vol/web
+
+USER django-user

cinema_service/settings.py

@@ -11,6 +11,7 @@
 """
 from datetime import timedelta
 from pathlib import Path
+import os
 
 # Build paths inside the project like this: BASE_DIR / 'subdir'.
 BASE_DIR = Path(__file__).resolve().parent.parent
@@ -47,6 +48,7 @@
     "debug_toolbar",
     "cinema",
     "user",
+    "starter",
 ]
 
 MIDDLEWARE = [
@@ -86,8 +88,12 @@
 
 DATABASES = {
     "default": {
-        "ENGINE": "django.db.backends.sqlite3",
-        "NAME": BASE_DIR / "db.sqlite3",
+        "ENGINE": "django.db.backends.postgresql",
+        "NAME": os.environ.get("POSTGRES_DB"),
+        "USER": os.environ.get("POSTGRES_USER"),
+        "PASSWORD": os.environ.get("POSTGRES_PASSWORD"),
+        "HOST": os.environ.get("DB_HOST"),
+        "PORT": os.environ.get("DB_PORT"),
     }
 }
 
@@ -125,7 +131,7 @@
 
 USE_I18N = True
 
-USE_TZ = False
+USE_TZ = True
 
 
 # Static files (CSS, JavaScript, Images)

docker-compose.yml

@@ -0,0 +1,27 @@
+services:
+  web:
+    build: .
+    container_name: cinema_service
+    command: >
+      sh -c "python manage.py wait_for_db &&
+             python manage.py migrate &&
+             python manage.py runserver 0.0.0.0:8000"
+    ports:
+      - "8000:8000"
+    volumes:
+      - ./:/app
+    env_file:
+      - .env
+  db:
+    image: postgres:15-alpine
+    container_name: postgres_container
+    restart: always
+    env_file:
+      - .env
+    ports:
+      - "5432:5432"
+    volumes:
+      - pgdata:/var/lib/postgresql/data
+
+volumes:
+  pgdata:

requirements.txt

@@ -1,10 +1,28 @@
-django
-flake8
-flake8-quotes
-flake8-variables-names
-pep8-naming
-django-debug-toolbar
-djangorestframework
-djangorestframework-simplejwt
-drf-spectacular
-Pillow
+asgiref==3.11.1
+attrs==26.1.0
+Django==5.2.13
+django-debug-toolbar==6.3.0
+djangorestframework==3.17.1
+djangorestframework_simplejwt==5.5.1
+drf-spectacular==0.29.0
+flake8==7.3.0
+flake8-quotes==3.4.0
+flake8-variables-names==0.0.6
+inflection==0.5.1
+jsonschema==4.26.0
+jsonschema-specifications==2025.9.1
+mccabe==0.7.0
+pep8-naming==0.15.1
+pillow==12.2.0
+psycopg2-binary==2.9.11
+pycodestyle==2.14.0
+pyflakes==3.4.0
+PyJWT==2.12.1
+PyYAML==6.0.3
+referencing==0.37.0
+rpds-py==0.30.0
+setuptools==82.0.1
+sqlparse==0.5.5
+typing_extensions==4.15.0
+tzdata==2026.1
+uritemplate==4.2.0

starter/management/commands/wait_for_db.py

@@ -0,0 +1,35 @@
+import time
+from django.core.management.base import BaseCommand
+from django.db import connections
+from django.db.utils import OperationalError
+
+
+class Command(BaseCommand):
+
+    def handle(self, *args, **kwargs):
+        self.stdout.write("Waiting for database...")
+        try_counter = 0
+        max_retries = 40
+
+        while True:
+            try:
+                db_conn = connections["default"]
+                db_conn.cursor()
+
+                self.stdout.write(self.style.SUCCESS("Database connected!"))
+                break
+
+            except OperationalError:
+                self.stdout.write(
+                    "Database unavailable, waiting 2 seconds..."
+                )
+                time.sleep(2)
+                try_counter += 1
+
+            if try_counter >= max_retries:
+                self.stdout.write(
+                    self.style.ERROR("Cannot connect to db!"
+                                     " Check your connection or"
+                                     " try again later.!")
+                )
+                raise Exception("Database not available")