Add docker configuration

Dockerfile

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+FROM iterativ/python3_netcat
+ENV PYTHONUNBUFFERED 1
+RUN mkdir /env
+RUN mkdir /app
+
+RUN pip install pipenv
+
+ADD ./server/ /app/
+#RUN apt-get update && apt-get -y install netcat && apt-get clean
+#RUN apt-get -y install netcat
+WORKDIR /app
+RUN pipenv install --system --deploy

Dockerfile.pythonnc

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+FROM python:3.6
+RUN apt-get update && apt-get install -y netcat

docker-compose.yml

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+version: '3'
+
+services:
+  db:
+    image: 'postgres'
+    environment:
+      - POSTGRES_PASSWORD=skillbox
+      - POSTGRES_USER=skillbox
+      - POSTGRES_DB=skillbox
+    volumes:
+      - helloclassdb:/var/lib/postgresql/data
+  web:
+    build: .
+    command: python manage.py runserver 0.0.0.0:8000
+    volumes:
+      - "./server:/app"
+    ports:
+      - "8000:8000"
+    depends_on:
+      - db
+
+volumes:
+  helloclassdb: