feat(docker): add Docker setup

.dockerignore

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+.venv/
+.github/
+__pycache__/
+*.pyc
+*.pyo
+.travis.yml
+.pre-commit-config.yaml
+db.sqlite3
+README.md
+.git/

Dockerfile

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+ARG PYTHON_VERSION=3.9
+
+FROM python:${PYTHON_VERSION}-slim AS build
+
+ENV PYTHONUNBUFFERED=1
+WORKDIR /app
+
+COPY requirements.txt ./
+
+RUN pip install --no-cache-dir --prefix=/install -r requirements.txt
+RUN cp -a /install/. /usr/local/
+
+COPY . .
+
+RUN python manage.py migrate
+
+FROM python:${PYTHON_VERSION}-slim AS run
+ENV PYTHONUNBUFFERED=1
+
+WORKDIR /app
+
+COPY --from=build /usr/local /usr/local
+COPY --from=build /app /app
+EXPOSE 8080
+
+CMD [ "python", "manage.py", "runserver", "0.0.0.0:8080" ]

INSTRUCTION.md

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+## Todo list application in Docker
+
+This is a to-do list web application with basic features of most web apps, i.e., accounts/login, API, and interactive UI.
+
+Link to the Docker Hub repository with the app image: [prostoponchik/todoapp](https://hub.docker.com/r/prostoponchik/todoapp)
+
+## Instructions for building and running the container from GitHub repository
+
+1. Clone the repository:
+
+```
+git clone https://github.com/ProstoPonchik/devops_todolist
+```
+
+2. Navigate to the project directory:
+
+```
+cd devops_todolist
+```
+
+3. Build the Docker image and tag it for Docker Hub:
+
+```
+docker build -t todoapp:1.0.0 -t prostoponchik/todoapp:1.0.0 .
+```
+
+4. Run the container:
+
+```
+docker run -d -p 8080:8080 --name todoapp_container prostoponchik/todoapp:1.0.0
+```
+
+## Publishing the image to Docker Hub
+
+1. Log in to your Docker Hub account:
+
+```
+docker login
+```
+
+2. Tag the image for your Docker Hub repository:
+
+```
+docker tag todoapp:1.0.0 prostoponchik/todoapp:1.0.0
+```
+
+3. Push the image to Docker Hub:
+
+```
+docker push prostoponchik/todoapp:1.0.0
+```
+
+
+## Instructions for running the container from Docker Hub image
+
+1. Pull the image from Docker Hub:
+
+```
+docker pull prostoponchik/todoapp:1.0.0
+```
+
+2. Run the container:
+
+```
+docker run -d -p 8080:8080 --name todoapp_container prostoponchik/todoapp:1.0.0
+```
+
+## Accessing the application via a browser
+
+Open your web browser and navigate to `http://localhost:8080/` to access the landing page of the ToDo application. You can also access the API at `http://localhost:8080/api/`.